Finding the Fourth Proportional to 6,301.12, 8,690.72 and 3,909.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,301.12 : 8,690.72 = 3,909.76 : x
2. Step 2: Convert to fraction form
   6,301.12/8,690.72 = 3,909.76/x
3. Step 3: Cross multiply
   6,301.12x = 8,690.72 × 3,909.76
4. Step 4: Simplify right side
   6,301.12x = 33,978,629.43
5. Step 5: Solve for x
   x = 33,978,629.43/6,301.12
6. Step 6: Final answer
   x = 5,392.47