Finding the Fourth Proportional to 12,748.49, 17,588 and 9,399.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,748.49 : 17,588 = 9,399.27 : x
2. Step 2: Convert to fraction form
   12,748.49/17,588 = 9,399.27/x
3. Step 3: Cross multiply
   12,748.49x = 17,588 × 9,399.27
4. Step 4: Simplify right side
   12,748.49x = 165,314,272.82
5. Step 5: Solve for x
   x = 165,314,272.82/12,748.49
6. Step 6: Final answer
   x = 12,967.36