Finding the Fourth Proportional to 77,061.30, 106,315.29 and 56,966.43

Step by Step Solution

1. Step 1: Write the proportion equation
   77,061.30 : 106,315.29 = 56,966.43 : x
2. Step 2: Convert to fraction form
   77,061.30/106,315.29 = 56,966.43/x
3. Step 3: Cross multiply
   77,061.30x = 106,315.29 × 56,966.43
4. Step 4: Simplify right side
   77,061.30x = 6,056,402,525.71
5. Step 5: Solve for x
   x = 6,056,402,525.71/77,061.30
6. Step 6: Final answer
   x = 78,592.01