Finding the Fourth Proportional to 915,220, 1,263,003.96 and 557,524

Step by Step Solution

1. Step 1: Write the proportion equation
   915,220 : 1,263,003.96 = 557,524 : x
2. Step 2: Convert to fraction form
   915,220/1,263,003.96 = 557,524/x
3. Step 3: Cross multiply
   915,220x = 1,263,003.96 × 557,524
4. Step 4: Simplify right side
   915,220x = 704,155,019,795.04
5. Step 5: Solve for x
   x = 704,155,019,795.04/915,220
6. Step 6: Final answer
   x = 769,383.34