Finding the Fourth Proportional to 2,156,499.16, 3,234,195.15 and 639,823.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156,499.16 : 3,234,195.15 = 639,823.29 : x
2. Step 2: Convert to fraction form
   2,156,499.16/3,234,195.15 = 639,823.29/x
3. Step 3: Cross multiply
   2,156,499.16x = 3,234,195.15 × 639,823.29
4. Step 4: Simplify right side
   2,156,499.16x = 2,069,313,381,375.04
5. Step 5: Solve for x
   x = 2,069,313,381,375.04/2,156,499.16
6. Step 6: Final answer
   x = 959,570.69