Finding the Fourth Proportional to 123,352.56, 170,173.46 and 72,380.88

Step by Step Solution

1. Step 1: Write the proportion equation
   123,352.56 : 170,173.46 = 72,380.88 : x
2. Step 2: Convert to fraction form
   123,352.56/170,173.46 = 72,380.88/x
3. Step 3: Cross multiply
   123,352.56x = 170,173.46 × 72,380.88
4. Step 4: Simplify right side
   123,352.56x = 12,317,304,425.54
5. Step 5: Solve for x
   x = 12,317,304,425.54/123,352.56
6. Step 6: Final answer
   x = 99,854.47