FC$\mathrm{.}74$Universal Studios is in the process of opening a new theme park in California and wants to forecast the number of visitors it should expect each season. They have decided to use data from its Florida theme park as a basis for forecasting attendance at the new California park.$$The table below shows the total attendance numbers, by season, for the Florida theme park during the years $2020$ through $2023$:$$

$$

$$Season$2020202120222023$Winter$763,000822,000944,000924,000$Spring$1,362,0001,312,0001,357,0001,365,000$Summer$1,421,0001,388,0001,547,0001,518,000$Fall$798,000781,000723,000876,000$

What is the seasonal index for spring? $($Display your answer to two decimal places.$)$

$1\mathrm{.}21$

What is the seasonal index for summer? $($Display your answer to two decimal places.$)$

$1\mathrm{.}31$

What is the seasonal index for fall? $($Display your answer to two decimal places.$)$

$0\mathrm{.}71$

Suppose the $2024$ forecast calls for a total of $3,900,000$ visitors. How many visitors should they expect in the winter?$($Display your answer to$$the nearest whole number.$)$

$?$

I got everything right except the last questions. Can i please get a step by step assistance