Finding the Fourth Proportional to 65,868.82, 90,951.37 and 60,831.20

Step by Step Solution

1. Step 1: Write the proportion equation
   65,868.82 : 90,951.37 = 60,831.20 : x
2. Step 2: Convert to fraction form
   65,868.82/90,951.37 = 60,831.20/x
3. Step 3: Cross multiply
   65,868.82x = 90,951.37 × 60,831.20
4. Step 4: Simplify right side
   65,868.82x = 5,532,680,371.91
5. Step 5: Solve for x
   x = 5,532,680,371.91/65,868.82
6. Step 6: Final answer
   x = 83,995.44