Finding the Fourth Proportional to 1,061,352.05, 1,589,695.28 and 639,892.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061,352.05 : 1,589,695.28 = 639,892.85 : x
2. Step 2: Convert to fraction form
   1,061,352.05/1,589,695.28 = 639,892.85/x
3. Step 3: Cross multiply
   1,061,352.05x = 1,589,695.28 × 639,892.85
4. Step 4: Simplify right side
   1,061,352.05x = 1,017,234,640,151.28
5. Step 5: Solve for x
   x = 1,017,234,640,151.28/1,061,352.05
6. Step 6: Final answer
   x = 958,432.82