Finding the Fourth Proportional to 12,443.12, 18,671.16 and 5,516

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.12 : 18,671.16 = 5,516 : x
2. Step 2: Convert to fraction form
   12,443.12/18,671.16 = 5,516/x
3. Step 3: Cross multiply
   12,443.12x = 18,671.16 × 5,516
4. Step 4: Simplify right side
   12,443.12x = 102,990,118.56
5. Step 5: Solve for x
   x = 102,990,118.56/12,443.12
6. Step 6: Final answer
   x = 8,276.87