Finding the Fourth Proportional to 81,831.96, 112,438.71 and 65,035.80

Step by Step Solution

1. Step 1: Write the proportion equation
   81,831.96 : 112,438.71 = 65,035.80 : x
2. Step 2: Convert to fraction form
   81,831.96/112,438.71 = 65,035.80/x
3. Step 3: Cross multiply
   81,831.96x = 112,438.71 × 65,035.80
4. Step 4: Simplify right side
   81,831.96x = 7,312,541,455.82
5. Step 5: Solve for x
   x = 7,312,541,455.82/81,831.96
6. Step 6: Final answer
   x = 89,360.46