Finding the Fourth Proportional to 6,311.32, 8,709.50 and 3,478.96

Step by Step Solution

1. Step 1: Write the proportion equation
   6,311.32 : 8,709.50 = 3,478.96 : x
2. Step 2: Convert to fraction form
   6,311.32/8,709.50 = 3,478.96/x
3. Step 3: Cross multiply
   6,311.32x = 8,709.50 × 3,478.96
4. Step 4: Simplify right side
   6,311.32x = 30,300,002.12
5. Step 5: Solve for x
   x = 30,300,002.12/6,311.32
6. Step 6: Final answer
   x = 4,800.90