Finding the Fourth Proportional to 6,423.12, 8,864.25 and 3,904.82

Step by Step Solution

1. Step 1: Write the proportion equation
   6,423.12 : 8,864.25 = 3,904.82 : x
2. Step 2: Convert to fraction form
   6,423.12/8,864.25 = 3,904.82/x
3. Step 3: Cross multiply
   6,423.12x = 8,864.25 × 3,904.82
4. Step 4: Simplify right side
   6,423.12x = 34,613,274.96
5. Step 5: Solve for x
   x = 34,613,274.96/6,423.12
6. Step 6: Final answer
   x = 5,388.86