Finding the Fourth Proportional to 71,498.70, 98,443.89 and 60,721.11

Step by Step Solution

1. Step 1: Write the proportion equation
   71,498.70 : 98,443.89 = 60,721.11 : x
2. Step 2: Convert to fraction form
   71,498.70/98,443.89 = 60,721.11/x
3. Step 3: Cross multiply
   71,498.70x = 98,443.89 × 60,721.11
4. Step 4: Simplify right side
   71,498.70x = 5,977,622,273.52
5. Step 5: Solve for x
   x = 5,977,622,273.52/71,498.70
6. Step 6: Final answer
   x = 83,604.63