Finding the Fourth Proportional to 721,890.57, 1,083,900.35 and 402,666.15

Step by Step Solution

1. Step 1: Write the proportion equation
   721,890.57 : 1,083,900.35 = 402,666.15 : x
2. Step 2: Convert to fraction form
   721,890.57/1,083,900.35 = 402,666.15/x
3. Step 3: Cross multiply
   721,890.57x = 1,083,900.35 × 402,666.15
4. Step 4: Simplify right side
   721,890.57x = 436,449,978,904.82
5. Step 5: Solve for x
   x = 436,449,978,904.82/721,890.57
6. Step 6: Final answer
   x = 604,592.99