Finding the Fourth Proportional to 56,850.50, 78,456.12 and 31,700

Step by Step Solution

1. Step 1: Write the proportion equation
   56,850.50 : 78,456.12 = 31,700 : x
2. Step 2: Convert to fraction form
   56,850.50/78,456.12 = 31,700/x
3. Step 3: Cross multiply
   56,850.50x = 78,456.12 × 31,700
4. Step 4: Simplify right side
   56,850.50x = 2,487,059,004
5. Step 5: Solve for x
   x = 2,487,059,004/56,850.50
6. Step 6: Final answer
   x = 43,747.35