Finding the Fourth Proportional to 12,141.78, 16,756.92 and 7,429.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,141.78 : 16,756.92 = 7,429.20 : x
2. Step 2: Convert to fraction form
   12,141.78/16,756.92 = 7,429.20/x
3. Step 3: Cross multiply
   12,141.78x = 16,756.92 × 7,429.20
4. Step 4: Simplify right side
   12,141.78x = 124,490,510.06
5. Step 5: Solve for x
   x = 124,490,510.06/12,141.78
6. Step 6: Final answer
   x = 10,253.07