Finding the Fourth Proportional to 71,672.50, 98,903.37 and 39,840.22

Step by Step Solution

1. Step 1: Write the proportion equation
   71,672.50 : 98,903.37 = 39,840.22 : x
2. Step 2: Convert to fraction form
   71,672.50/98,903.37 = 39,840.22/x
3. Step 3: Cross multiply
   71,672.50x = 98,903.37 × 39,840.22
4. Step 4: Simplify right side
   71,672.50x = 3,940,332,019.54
5. Step 5: Solve for x
   x = 3,940,332,019.54/71,672.50
6. Step 6: Final answer
   x = 54,976.90