Finding the Fourth Proportional to 56,633.72, 78,156.54 and 31,142.02

Step by Step Solution

1. Step 1: Write the proportion equation
   56,633.72 : 78,156.54 = 31,142.02 : x
2. Step 2: Convert to fraction form
   56,633.72/78,156.54 = 31,142.02/x
3. Step 3: Cross multiply
   56,633.72x = 78,156.54 × 31,142.02
4. Step 4: Simplify right side
   56,633.72x = 2,433,952,727.20
5. Step 5: Solve for x
   x = 2,433,952,727.20/56,633.72
6. Step 6: Final answer
   x = 42,977.09