Finding the Fourth Proportional to 12,667.59, 17,387.63 and 12,126.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,667.59 : 17,387.63 = 12,126.31 : x
2. Step 2: Convert to fraction form
   12,667.59/17,387.63 = 12,126.31/x
3. Step 3: Cross multiply
   12,667.59x = 17,387.63 × 12,126.31
4. Step 4: Simplify right side
   12,667.59x = 210,847,791.55
5. Step 5: Solve for x
   x = 210,847,791.55/12,667.59
6. Step 6: Final answer
   x = 16,644.66