Finding the Fourth Proportional to 12,439.48, 18,659.24 and 3,673.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,439.48 : 18,659.24 = 3,673.72 : x
2. Step 2: Convert to fraction form
   12,439.48/18,659.24 = 3,673.72/x
3. Step 3: Cross multiply
   12,439.48x = 18,659.24 × 3,673.72
4. Step 4: Simplify right side
   12,439.48x = 68,548,823.17
5. Step 5: Solve for x
   x = 68,548,823.17/12,439.48
6. Step 6: Final answer
   x = 5,510.59