Finding the Fourth Proportional to 12,668.59, 17,389 and 12,127.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,668.59 : 17,389 = 12,127.31 : x
2. Step 2: Convert to fraction form
   12,668.59/17,389 = 12,127.31/x
3. Step 3: Cross multiply
   12,668.59x = 17,389 × 12,127.31
4. Step 4: Simplify right side
   12,668.59x = 210,881,793.59
5. Step 5: Solve for x
   x = 210,881,793.59/12,668.59
6. Step 6: Final answer
   x = 16,646.04