Finding the Fourth Proportional to 12,491.52, 17,238.74 and 8,246.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,491.52 : 17,238.74 = 8,246.31 : x
2. Step 2: Convert to fraction form
   12,491.52/17,238.74 = 8,246.31/x
3. Step 3: Cross multiply
   12,491.52x = 17,238.74 × 8,246.31
4. Step 4: Simplify right side
   12,491.52x = 142,155,952.82
5. Step 5: Solve for x
   x = 142,155,952.82/12,491.52
6. Step 6: Final answer
   x = 11,380.20