Finding the Fourth Proportional to 12,241.18, 18,360.20 and 3,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,241.18 : 18,360.20 = 3,920.50 : x
2. Step 2: Convert to fraction form
   12,241.18/18,360.20 = 3,920.50/x
3. Step 3: Cross multiply
   12,241.18x = 18,360.20 × 3,920.50
4. Step 4: Simplify right side
   12,241.18x = 71,981,164.10
5. Step 5: Solve for x
   x = 71,981,164.10/12,241.18
6. Step 6: Final answer
   x = 5,880.25