Finding the Fourth Proportional to 123,118.66, 169,904.33 and 72,140.46

Step by Step Solution

1. Step 1: Write the proportion equation
   123,118.66 : 169,904.33 = 72,140.46 : x
2. Step 2: Convert to fraction form
   123,118.66/169,904.33 = 72,140.46/x
3. Step 3: Cross multiply
   123,118.66x = 169,904.33 × 72,140.46
4. Step 4: Simplify right side
   123,118.66x = 12,256,976,522.19
5. Step 5: Solve for x
   x = 12,256,976,522.19/123,118.66
6. Step 6: Final answer
   x = 99,554.17