Finding the Fourth Proportional to 103,932.08, 143,426.72 and 65,708.40

Step by Step Solution

1. Step 1: Write the proportion equation
   103,932.08 : 143,426.72 = 65,708.40 : x
2. Step 2: Convert to fraction form
   103,932.08/143,426.72 = 65,708.40/x
3. Step 3: Cross multiply
   103,932.08x = 143,426.72 × 65,708.40
4. Step 4: Simplify right side
   103,932.08x = 9,424,340,288.45
5. Step 5: Solve for x
   x = 9,424,340,288.45/103,932.08
6. Step 6: Final answer
   x = 90,677.88