Finding the Fourth Proportional to 12,915.21, 19,370.27 and 3,552.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.21 : 19,370.27 = 3,552.82 : x
2. Step 2: Convert to fraction form
   12,915.21/19,370.27 = 3,552.82/x
3. Step 3: Cross multiply
   12,915.21x = 19,370.27 × 3,552.82
4. Step 4: Simplify right side
   12,915.21x = 68,819,043.12
5. Step 5: Solve for x
   x = 68,819,043.12/12,915.21
6. Step 6: Final answer
   x = 5,328.53