Finding the Fourth Proportional to 12,244.90, 18,355.71 and 3,919.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,244.90 : 18,355.71 = 3,919.55 : x
2. Step 2: Convert to fraction form
   12,244.90/18,355.71 = 3,919.55/x
3. Step 3: Cross multiply
   12,244.90x = 18,355.71 × 3,919.55
4. Step 4: Simplify right side
   12,244.90x = 71,946,123.13
5. Step 5: Solve for x
   x = 71,946,123.13/12,244.90
6. Step 6: Final answer
   x = 5,875.60