Finding the Fourth Proportional to 12,255.30, 18,380.16 and 3,487.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,255.30 : 18,380.16 = 3,487.86 : x
2. Step 2: Convert to fraction form
   12,255.30/18,380.16 = 3,487.86/x
3. Step 3: Cross multiply
   12,255.30x = 18,380.16 × 3,487.86
4. Step 4: Simplify right side
   12,255.30x = 64,107,424.86
5. Step 5: Solve for x
   x = 64,107,424.86/12,255.30
6. Step 6: Final answer
   x = 5,231.00