Finding the Fourth Proportional to 1,287,105.50, 1,930,771.70 and 477,499.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,105.50 : 1,930,771.70 = 477,499.29 : x
2. Step 2: Convert to fraction form
   1,287,105.50/1,930,771.70 = 477,499.29/x
3. Step 3: Cross multiply
   1,287,105.50x = 1,930,771.70 × 477,499.29
4. Step 4: Simplify right side
   1,287,105.50x = 921,942,115,902.09
5. Step 5: Solve for x
   x = 921,942,115,902.09/1,287,105.50
6. Step 6: Final answer
   x = 716,291.02