Finding the Fourth Proportional to 8,781.83, 12,120.05 and 5,426.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,781.83 : 12,120.05 = 5,426.27 : x
2. Step 2: Convert to fraction form
   8,781.83/12,120.05 = 5,426.27/x
3. Step 3: Cross multiply
   8,781.83x = 12,120.05 × 5,426.27
4. Step 4: Simplify right side
   8,781.83x = 65,766,616.68
5. Step 5: Solve for x
   x = 65,766,616.68/8,781.83
6. Step 6: Final answer
   x = 7,488.95