Finding the Fourth Proportional to 123,079.68, 169,758.72 and 78,382.08

Step by Step Solution

1. Step 1: Write the proportion equation
   123,079.68 : 169,758.72 = 78,382.08 : x
2. Step 2: Convert to fraction form
   123,079.68/169,758.72 = 78,382.08/x
3. Step 3: Cross multiply
   123,079.68x = 169,758.72 × 78,382.08
4. Step 4: Simplify right side
   123,079.68x = 13,306,041,571.74
5. Step 5: Solve for x
   x = 13,306,041,571.74/123,079.68
6. Step 6: Final answer
   x = 108,109.17