Finding the Fourth Proportional to 12,339.52, 17,022.72 and 8,090.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,339.52 : 17,022.72 = 8,090.56 : x
2. Step 2: Convert to fraction form
   12,339.52/17,022.72 = 8,090.56/x
3. Step 3: Cross multiply
   12,339.52x = 17,022.72 × 8,090.56
4. Step 4: Simplify right side
   12,339.52x = 137,723,337.52
5. Step 5: Solve for x
   x = 137,723,337.52/12,339.52
6. Step 6: Final answer
   x = 11,161.16