Finding the Fourth Proportional to 12,429.59, 17,159.18 and 9,590.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.59 : 17,159.18 = 9,590.58 : x
2. Step 2: Convert to fraction form
   12,429.59/17,159.18 = 9,590.58/x
3. Step 3: Cross multiply
   12,429.59x = 17,159.18 × 9,590.58
4. Step 4: Simplify right side
   12,429.59x = 164,566,440.57
5. Step 5: Solve for x
   x = 164,566,440.57/12,429.59
6. Step 6: Final answer
   x = 13,239.90