Finding the Fourth Proportional to 6,127.30, 8,456.88 and 3,891.79

Step by Step Solution

1. Step 1: Write the proportion equation
   6,127.30 : 8,456.88 = 3,891.79 : x
2. Step 2: Convert to fraction form
   6,127.30/8,456.88 = 3,891.79/x
3. Step 3: Cross multiply
   6,127.30x = 8,456.88 × 3,891.79
4. Step 4: Simplify right side
   6,127.30x = 32,912,401.02
5. Step 5: Solve for x
   x = 32,912,401.02/6,127.30
6. Step 6: Final answer
   x = 5,371.44