Finding the Fourth Proportional to 103,431.06, 142,789.28 and 69,617.34

Step by Step Solution

1. Step 1: Write the proportion equation
   103,431.06 : 142,789.28 = 69,617.34 : x
2. Step 2: Convert to fraction form
   103,431.06/142,789.28 = 69,617.34/x
3. Step 3: Cross multiply
   103,431.06x = 142,789.28 × 69,617.34
4. Step 4: Simplify right side
   103,431.06x = 9,940,609,506.03
5. Step 5: Solve for x
   x = 9,940,609,506.03/103,431.06
6. Step 6: Final answer
   x = 96,108.55