Finding the Fourth Proportional to 12,438.32, 17,171.24 and 9,599.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,438.32 : 17,171.24 = 9,599.31 : x
2. Step 2: Convert to fraction form
   12,438.32/17,171.24 = 9,599.31/x
3. Step 3: Cross multiply
   12,438.32x = 17,171.24 × 9,599.31
4. Step 4: Simplify right side
   12,438.32x = 164,832,007.85
5. Step 5: Solve for x
   x = 164,832,007.85/12,438.32
6. Step 6: Final answer
   x = 13,251.96