Finding the Fourth Proportional to 103,693.52, 143,141.20 and 69,721.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,693.52 : 143,141.20 = 69,721.72 : x
2. Step 2: Convert to fraction form
   103,693.52/143,141.20 = 69,721.72/x
3. Step 3: Cross multiply
   103,693.52x = 143,141.20 × 69,721.72
4. Step 4: Simplify right side
   103,693.52x = 9,980,050,666.86
5. Step 5: Solve for x
   x = 9,980,050,666.86/103,693.52
6. Step 6: Final answer
   x = 96,245.65