Finding the Fourth Proportional to 915,219, 1,263,002.58 and 557,523

Step by Step Solution

1. Step 1: Write the proportion equation
   915,219 : 1,263,002.58 = 557,523 : x
2. Step 2: Convert to fraction form
   915,219/1,263,002.58 = 557,523/x
3. Step 3: Cross multiply
   915,219x = 1,263,002.58 × 557,523
4. Step 4: Simplify right side
   915,219x = 704,152,987,409.34
5. Step 5: Solve for x
   x = 704,152,987,409.34/915,219
6. Step 6: Final answer
   x = 769,381.96