Finding the Fourth Proportional to 12,216.31, 16,862.84 and 7,434.07

Step by Step Solution

1. Step 1: Write the proportion equation
   12,216.31 : 16,862.84 = 7,434.07 : x
2. Step 2: Convert to fraction form
   12,216.31/16,862.84 = 7,434.07/x
3. Step 3: Cross multiply
   12,216.31x = 16,862.84 × 7,434.07
4. Step 4: Simplify right side
   12,216.31x = 125,359,532.96
5. Step 5: Solve for x
   x = 125,359,532.96/12,216.31
6. Step 6: Final answer
   x = 10,261.65