Finding the Fourth Proportional to 8,363.91, 12,540.16 and 3,981.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,363.91 : 12,540.16 = 3,981.81 : x
2. Step 2: Convert to fraction form
   8,363.91/12,540.16 = 3,981.81/x
3. Step 3: Cross multiply
   8,363.91x = 12,540.16 × 3,981.81
4. Step 4: Simplify right side
   8,363.91x = 49,932,534.49
5. Step 5: Solve for x
   x = 49,932,534.49/8,363.91
6. Step 6: Final answer
   x = 5,970.00