Finding the Fourth Proportional to 103,431.33, 142,686.41 and 88,484.56

Step by Step Solution

1. Step 1: Write the proportion equation
   103,431.33 : 142,686.41 = 88,484.56 : x
2. Step 2: Convert to fraction form
   103,431.33/142,686.41 = 88,484.56/x
3. Step 3: Cross multiply
   103,431.33x = 142,686.41 × 88,484.56
4. Step 4: Simplify right side
   103,431.33x = 12,625,543,407.69
5. Step 5: Solve for x
   x = 12,625,543,407.69/103,431.33
6. Step 6: Final answer
   x = 122,066.92