Finding the Fourth Proportional to 12,061.76, 18,080.24 and 6,856.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,061.76 : 18,080.24 = 6,856.64 : x
2. Step 2: Convert to fraction form
   12,061.76/18,080.24 = 6,856.64/x
3. Step 3: Cross multiply
   12,061.76x = 18,080.24 × 6,856.64
4. Step 4: Simplify right side
   12,061.76x = 123,969,696.79
5. Step 5: Solve for x
   x = 123,969,696.79/12,061.76
6. Step 6: Final answer
   x = 10,277.91