Finding the Fourth Proportional to 103,680.52, 143,123.26 and 69,708.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,680.52 : 143,123.26 = 69,708.72 : x
2. Step 2: Convert to fraction form
   103,680.52/143,123.26 = 69,708.72/x
3. Step 3: Cross multiply
   103,680.52x = 143,123.26 × 69,708.72
4. Step 4: Simplify right side
   103,680.52x = 9,976,939,256.83
5. Step 5: Solve for x
   x = 9,976,939,256.83/103,680.52
6. Step 6: Final answer
   x = 96,227.71