Finding the Fourth Proportional to 12,421.39, 17,132.32 and 9,013.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,421.39 : 17,132.32 = 9,013.54 : x
2. Step 2: Convert to fraction form
   12,421.39/17,132.32 = 9,013.54/x
3. Step 3: Cross multiply
   12,421.39x = 17,132.32 × 9,013.54
4. Step 4: Simplify right side
   12,421.39x = 154,422,851.61
5. Step 5: Solve for x
   x = 154,422,851.61/12,421.39
6. Step 6: Final answer
   x = 12,432.01