Finding the Fourth Proportional to 8,591.76, 12,863.34 and 5,463.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,591.76 : 12,863.34 = 5,463.90 : x
2. Step 2: Convert to fraction form
   8,591.76/12,863.34 = 5,463.90/x
3. Step 3: Cross multiply
   8,591.76x = 12,863.34 × 5,463.90
4. Step 4: Simplify right side
   8,591.76x = 70,284,003.43
5. Step 5: Solve for x
   x = 70,284,003.43/8,591.76
6. Step 6: Final answer
   x = 8,180.40