Finding the Fourth Proportional to 89,048.72, 122,782.96 and 71,086.16

Step by Step Solution

1. Step 1: Write the proportion equation
   89,048.72 : 122,782.96 = 71,086.16 : x
2. Step 2: Convert to fraction form
   89,048.72/122,782.96 = 71,086.16/x
3. Step 3: Cross multiply
   89,048.72x = 122,782.96 × 71,086.16
4. Step 4: Simplify right side
   89,048.72x = 8,728,169,139.83
5. Step 5: Solve for x
   x = 8,728,169,139.83/89,048.72
6. Step 6: Final answer
   x = 98,015.66