Finding the Fourth Proportional to 12,916.18, 17,819.74 and 8,442.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,916.18 : 17,819.74 = 8,442.52 : x
2. Step 2: Convert to fraction form
   12,916.18/17,819.74 = 8,442.52/x
3. Step 3: Cross multiply
   12,916.18x = 17,819.74 × 8,442.52
4. Step 4: Simplify right side
   12,916.18x = 150,443,445.69
5. Step 5: Solve for x
   x = 150,443,445.69/12,916.18
6. Step 6: Final answer
   x = 11,647.68