Finding the Fourth Proportional to 8,111.40, 12,168.90 and 3,727.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.40 : 12,168.90 = 3,727.80 : x
2. Step 2: Convert to fraction form
   8,111.40/12,168.90 = 3,727.80/x
3. Step 3: Cross multiply
   8,111.40x = 12,168.90 × 3,727.80
4. Step 4: Simplify right side
   8,111.40x = 45,363,225.42
5. Step 5: Solve for x
   x = 45,363,225.42/8,111.40
6. Step 6: Final answer
   x = 5,592.53