Finding the Fourth Proportional to 123,627.72, 170,557.98 and 80,657.76

Step by Step Solution

1. Step 1: Write the proportion equation
   123,627.72 : 170,557.98 = 80,657.76 : x
2. Step 2: Convert to fraction form
   123,627.72/170,557.98 = 80,657.76/x
3. Step 3: Cross multiply
   123,627.72x = 170,557.98 × 80,657.76
4. Step 4: Simplify right side
   123,627.72x = 13,756,824,616.92
5. Step 5: Solve for x
   x = 13,756,824,616.92/123,627.72
6. Step 6: Final answer
   x = 111,276.21