Finding the Fourth Proportional to 12,139.31, 16,752.54 and 6,834.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139.31 : 16,752.54 = 6,834.30 : x
2. Step 2: Convert to fraction form
   12,139.31/16,752.54 = 6,834.30/x
3. Step 3: Cross multiply
   12,139.31x = 16,752.54 × 6,834.30
4. Step 4: Simplify right side
   12,139.31x = 114,491,884.12
5. Step 5: Solve for x
   x = 114,491,884.12/12,139.31
6. Step 6: Final answer
   x = 9,431.50