Finding the Fourth Proportional to 123,470.57, 170,385.89 and 72,482.49

Step by Step Solution

1. Step 1: Write the proportion equation
   123,470.57 : 170,385.89 = 72,482.49 : x
2. Step 2: Convert to fraction form
   123,470.57/170,385.89 = 72,482.49/x
3. Step 3: Cross multiply
   123,470.57x = 170,385.89 × 72,482.49
4. Step 4: Simplify right side
   123,470.57x = 12,349,992,960.90
5. Step 5: Solve for x
   x = 12,349,992,960.90/123,470.57
6. Step 6: Final answer
   x = 100,023.78