Finding the Fourth Proportional to 2,156,689.50, 3,234,753.18 and 640,341.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156,689.50 : 3,234,753.18 = 640,341.96 : x
2. Step 2: Convert to fraction form
   2,156,689.50/3,234,753.18 = 640,341.96/x
3. Step 3: Cross multiply
   2,156,689.50x = 3,234,753.18 × 640,341.96
4. Step 4: Simplify right side
   2,156,689.50x = 2,071,348,191,397.43
5. Step 5: Solve for x
   x = 2,071,348,191,397.43/2,156,689.50
6. Step 6: Final answer
   x = 960,429.49