Finding the Fourth Proportional to 6,131.22, 8,456.52 and 3,891.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,131.22 : 8,456.52 = 3,891.15 : x
2. Step 2: Convert to fraction form
   6,131.22/8,456.52 = 3,891.15/x
3. Step 3: Cross multiply
   6,131.22x = 8,456.52 × 3,891.15
4. Step 4: Simplify right side
   6,131.22x = 32,905,587.80
5. Step 5: Solve for x
   x = 32,905,587.80/6,131.22
6. Step 6: Final answer
   x = 5,366.89