Finding the Fourth Proportional to 56,631.52, 78,149.83 and 31,137.92

Step by Step Solution

1. Step 1: Write the proportion equation
   56,631.52 : 78,149.83 = 31,137.92 : x
2. Step 2: Convert to fraction form
   56,631.52/78,149.83 = 31,137.92/x
3. Step 3: Cross multiply
   56,631.52x = 78,149.83 × 31,137.92
4. Step 4: Simplify right side
   56,631.52x = 2,433,422,608.11
5. Step 5: Solve for x
   x = 2,433,422,608.11/56,631.52
6. Step 6: Final answer
   x = 42,969.41