Finding the Fourth Proportional to 81,112.57, 111,990.69 and 52,501.48

Step by Step Solution

1. Step 1: Write the proportion equation
   81,112.57 : 111,990.69 = 52,501.48 : x
2. Step 2: Convert to fraction form
   81,112.57/111,990.69 = 52,501.48/x
3. Step 3: Cross multiply
   81,112.57x = 111,990.69 × 52,501.48
4. Step 4: Simplify right side
   81,112.57x = 5,879,676,691.24
5. Step 5: Solve for x
   x = 5,879,676,691.24/81,112.57
6. Step 6: Final answer
   x = 72,487.86