Finding the Fourth Proportional to 6,391.77, 8,821.89 and 3,739.43

Step by Step Solution

1. Step 1: Write the proportion equation
   6,391.77 : 8,821.89 = 3,739.43 : x
2. Step 2: Convert to fraction form
   6,391.77/8,821.89 = 3,739.43/x
3. Step 3: Cross multiply
   6,391.77x = 8,821.89 × 3,739.43
4. Step 4: Simplify right side
   6,391.77x = 32,988,796.01
5. Step 5: Solve for x
   x = 32,988,796.01/6,391.77
6. Step 6: Final answer
   x = 5,161.14