Finding the Fourth Proportional to 10,462.72, 15,674.29 and 8,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,462.72 : 15,674.29 = 8,111.20 : x
2. Step 2: Convert to fraction form
   10,462.72/15,674.29 = 8,111.20/x
3. Step 3: Cross multiply
   10,462.72x = 15,674.29 × 8,111.20
4. Step 4: Simplify right side
   10,462.72x = 127,137,301.05
5. Step 5: Solve for x
   x = 127,137,301.05/10,462.72
6. Step 6: Final answer
   x = 12,151.46