Finding the Fourth Proportional to 103,688.52, 143,134.30 and 69,716.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,688.52 : 143,134.30 = 69,716.72 : x
2. Step 2: Convert to fraction form
   103,688.52/143,134.30 = 69,716.72/x
3. Step 3: Cross multiply
   103,688.52x = 143,134.30 × 69,716.72
4. Step 4: Simplify right side
   103,688.52x = 9,978,853,915.50
5. Step 5: Solve for x
   x = 9,978,853,915.50/103,688.52
6. Step 6: Final answer
   x = 96,238.75