Finding the Fourth Proportional to 56,633.02, 78,151.90 and 31,139.41

Step by Step Solution

1. Step 1: Write the proportion equation
   56,633.02 : 78,151.90 = 31,139.41 : x
2. Step 2: Convert to fraction form
   56,633.02/78,151.90 = 31,139.41/x
3. Step 3: Cross multiply
   56,633.02x = 78,151.90 × 31,139.41
4. Step 4: Simplify right side
   56,633.02x = 2,433,604,056.38
5. Step 5: Solve for x
   x = 2,433,604,056.38/56,633.02
6. Step 6: Final answer
   x = 42,971.47