Finding the Fourth Proportional to 2,156,570.10, 3,234,301.38 and 639,894.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156,570.10 : 3,234,301.38 = 639,894.29 : x
2. Step 2: Convert to fraction form
   2,156,570.10/3,234,301.38 = 639,894.29/x
3. Step 3: Cross multiply
   2,156,570.10x = 3,234,301.38 × 639,894.29
4. Step 4: Simplify right side
   2,156,570.10x = 2,069,610,969,029.61
5. Step 5: Solve for x
   x = 2,069,610,969,029.61/2,156,570.10
6. Step 6: Final answer
   x = 959,677.11