Finding the Fourth Proportional to 12,139.88, 16,741.26 and 7,892.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139.88 : 16,741.26 = 7,892.10 : x
2. Step 2: Convert to fraction form
   12,139.88/16,741.26 = 7,892.10/x
3. Step 3: Cross multiply
   12,139.88x = 16,741.26 × 7,892.10
4. Step 4: Simplify right side
   12,139.88x = 132,123,698.05
5. Step 5: Solve for x
   x = 132,123,698.05/12,139.88
6. Step 6: Final answer
   x = 10,883.45