Finding the Fourth Proportional to 123,616.32, 170,612.37 and 72,629.03

Step by Step Solution

1. Step 1: Write the proportion equation
   123,616.32 : 170,612.37 = 72,629.03 : x
2. Step 2: Convert to fraction form
   123,616.32/170,612.37 = 72,629.03/x
3. Step 3: Cross multiply
   123,616.32x = 170,612.37 × 72,629.03
4. Step 4: Simplify right side
   123,616.32x = 12,391,411,093.27
5. Step 5: Solve for x
   x = 12,391,411,093.27/123,616.32
6. Step 6: Final answer
   x = 100,240.90