Finding the Fourth Proportional to 12,915.62, 19,342.67 and 8,970.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.62 : 19,342.67 = 8,970.82 : x
2. Step 2: Convert to fraction form
   12,915.62/19,342.67 = 8,970.82/x
3. Step 3: Cross multiply
   12,915.62x = 19,342.67 × 8,970.82
4. Step 4: Simplify right side
   12,915.62x = 173,519,610.89
5. Step 5: Solve for x
   x = 173,519,610.89/12,915.62
6. Step 6: Final answer
   x = 13,434.86