Finding the Fourth Proportional to 57,171.60, 78,901.49 and 31,680.52

Step by Step Solution

1. Step 1: Write the proportion equation
   57,171.60 : 78,901.49 = 31,680.52 : x
2. Step 2: Convert to fraction form
   57,171.60/78,901.49 = 31,680.52/x
3. Step 3: Cross multiply
   57,171.60x = 78,901.49 × 31,680.52
4. Step 4: Simplify right side
   57,171.60x = 2,499,640,113.92
5. Step 5: Solve for x
   x = 2,499,640,113.92/57,171.60
6. Step 6: Final answer
   x = 43,721.71