Finding the Fourth Proportional to 123,086.72, 169,748.16 and 80,629.76

Step by Step Solution

1. Step 1: Write the proportion equation
   123,086.72 : 169,748.16 = 80,629.76 : x
2. Step 2: Convert to fraction form
   123,086.72/169,748.16 = 80,629.76/x
3. Step 3: Cross multiply
   123,086.72x = 169,748.16 × 80,629.76
4. Step 4: Simplify right side
   123,086.72x = 13,686,753,401.24
5. Step 5: Solve for x
   x = 13,686,753,401.24/123,086.72
6. Step 6: Final answer
   x = 111,196.02