Finding the Fourth Proportional to 56,635.10, 78,156.73 and 31,143.12

Step by Step Solution

1. Step 1: Write the proportion equation
   56,635.10 : 78,156.73 = 31,143.12 : x
2. Step 2: Convert to fraction form
   56,635.10/78,156.73 = 31,143.12/x
3. Step 3: Cross multiply
   56,635.10x = 78,156.73 × 31,143.12
4. Step 4: Simplify right side
   56,635.10x = 2,434,044,167.04
5. Step 5: Solve for x
   x = 2,434,044,167.04/56,635.10
6. Step 6: Final answer
   x = 42,977.66