Finding the Fourth Proportional to 103,432.33, 142,687.78 and 88,485.56

Step by Step Solution

1. Step 1: Write the proportion equation
   103,432.33 : 142,687.78 = 88,485.56 : x
2. Step 2: Convert to fraction form
   103,432.33/142,687.78 = 88,485.56/x
3. Step 3: Cross multiply
   103,432.33x = 142,687.78 × 88,485.56
4. Step 4: Simplify right side
   103,432.33x = 12,625,808,118.46
5. Step 5: Solve for x
   x = 12,625,808,118.46/103,432.33
6. Step 6: Final answer
   x = 122,068.29