Finding the Fourth Proportional to 16,403.31, 24,576.62 and 12,915.59

Step by Step Solution

1. Step 1: Write the proportion equation
   16,403.31 : 24,576.62 = 12,915.59 : x
2. Step 2: Convert to fraction form
   16,403.31/24,576.62 = 12,915.59/x
3. Step 3: Cross multiply
   16,403.31x = 24,576.62 × 12,915.59
4. Step 4: Simplify right side
   16,403.31x = 317,421,360.04
5. Step 5: Solve for x
   x = 317,421,360.04/16,403.31
6. Step 6: Final answer
   x = 19,351.06