Finding the Fourth Proportional to 84,456.72, 116,538.48 and 71,761.32

Step by Step Solution

1. Step 1: Write the proportion equation
   84,456.72 : 116,538.48 = 71,761.32 : x
2. Step 2: Convert to fraction form
   84,456.72/116,538.48 = 71,761.32/x
3. Step 3: Cross multiply
   84,456.72x = 116,538.48 × 71,761.32
4. Step 4: Simplify right side
   84,456.72x = 8,362,955,155.59
5. Step 5: Solve for x
   x = 8,362,955,155.59/84,456.72
6. Step 6: Final answer
   x = 99,020.60