Finding the Fourth Proportional to 123,109.68, 169,794.72 and 89,123.16

Step by Step Solution

1. Step 1: Write the proportion equation
   123,109.68 : 169,794.72 = 89,123.16 : x
2. Step 2: Convert to fraction form
   123,109.68/169,794.72 = 89,123.16/x
3. Step 3: Cross multiply
   123,109.68x = 169,794.72 × 89,123.16
4. Step 4: Simplify right side
   123,109.68x = 15,132,641,997.72
5. Step 5: Solve for x
   x = 15,132,641,997.72/123,109.68
6. Step 6: Final answer
   x = 122,920.00