Finding the Fourth Proportional to 100,863.94, 139,145.48 and 65,065.48

Step by Step Solution

1. Step 1: Write the proportion equation
   100,863.94 : 139,145.48 = 65,065.48 : x
2. Step 2: Convert to fraction form
   100,863.94/139,145.48 = 65,065.48/x
3. Step 3: Cross multiply
   100,863.94x = 139,145.48 × 65,065.48
4. Step 4: Simplify right side
   100,863.94x = 9,053,567,799.53
5. Step 5: Solve for x
   x = 9,053,567,799.53/100,863.94
6. Step 6: Final answer
   x = 89,760.20