Finding the Fourth Proportional to 12,915.88, 19,371.27 and 3,553.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.88 : 19,371.27 = 3,553.49 : x
2. Step 2: Convert to fraction form
   12,915.88/19,371.27 = 3,553.49/x
3. Step 3: Cross multiply
   12,915.88x = 19,371.27 × 3,553.49
4. Step 4: Simplify right side
   12,915.88x = 68,835,614.23
5. Step 5: Solve for x
   x = 68,835,614.23/12,915.88
6. Step 6: Final answer
   x = 5,329.53