Finding the Fourth Proportional to 12,181.32, 18,272.43 and 5,516.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,181.32 : 18,272.43 = 5,516.55 : x
2. Step 2: Convert to fraction form
   12,181.32/18,272.43 = 5,516.55/x
3. Step 3: Cross multiply
   12,181.32x = 18,272.43 × 5,516.55
4. Step 4: Simplify right side
   12,181.32x = 100,800,773.72
5. Step 5: Solve for x
   x = 100,800,773.72/12,181.32
6. Step 6: Final answer
   x = 8,275.03