Finding the Fourth Proportional to 12,452.18, 18,672.79 and 3,687.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,452.18 : 18,672.79 = 3,687.78 : x
2. Step 2: Convert to fraction form
   12,452.18/18,672.79 = 3,687.78/x
3. Step 3: Cross multiply
   12,452.18x = 18,672.79 × 3,687.78
4. Step 4: Simplify right side
   12,452.18x = 68,861,141.51
5. Step 5: Solve for x
   x = 68,861,141.51/12,452.18
6. Step 6: Final answer
   x = 5,530.05