Finding the Fourth Proportional to 12,665.59, 17,384.88 and 12,124.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.59 : 17,384.88 = 12,124.31 : x
2. Step 2: Convert to fraction form
   12,665.59/17,384.88 = 12,124.31/x
3. Step 3: Cross multiply
   12,665.59x = 17,384.88 × 12,124.31
4. Step 4: Simplify right side
   12,665.59x = 210,779,704.74
5. Step 5: Solve for x
   x = 210,779,704.74/12,665.59
6. Step 6: Final answer
   x = 16,641.92