Finding the Fourth Proportional to 12,915.34, 19,375.15 and 4,593.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.34 : 19,375.15 = 4,593.60 : x
2. Step 2: Convert to fraction form
   12,915.34/19,375.15 = 4,593.60/x
3. Step 3: Cross multiply
   12,915.34x = 19,375.15 × 4,593.60
4. Step 4: Simplify right side
   12,915.34x = 89,001,689.04
5. Step 5: Solve for x
   x = 89,001,689.04/12,915.34
6. Step 6: Final answer
   x = 6,891.16