Finding the Fourth Proportional to 56,705.62, 78,250.70 and 31,553.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,705.62 : 78,250.70 = 31,553.50 : x
2. Step 2: Convert to fraction form
   56,705.62/78,250.70 = 31,553.50/x
3. Step 3: Cross multiply
   56,705.62x = 78,250.70 × 31,553.50
4. Step 4: Simplify right side
   56,705.62x = 2,469,083,462.45
5. Step 5: Solve for x
   x = 2,469,083,462.45/56,705.62
6. Step 6: Final answer
   x = 43,542.13