Finding the Fourth Proportional to 6,401.91, 8,798.88 and 5,651.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,401.91 : 8,798.88 = 5,651.31 : x
2. Step 2: Convert to fraction form
   6,401.91/8,798.88 = 5,651.31/x
3. Step 3: Cross multiply
   6,401.91x = 8,798.88 × 5,651.31
4. Step 4: Simplify right side
   6,401.91x = 49,725,198.53
5. Step 5: Solve for x
   x = 49,725,198.53/6,401.91
6. Step 6: Final answer
   x = 7,767.24