Finding the Fourth Proportional to 6,287.72, 8,681.11 and 3,900.24

Step by Step Solution

1. Step 1: Write the proportion equation
   6,287.72 : 8,681.11 = 3,900.24 : x
2. Step 2: Convert to fraction form
   6,287.72/8,681.11 = 3,900.24/x
3. Step 3: Cross multiply
   6,287.72x = 8,681.11 × 3,900.24
4. Step 4: Simplify right side
   6,287.72x = 33,858,402.72
5. Step 5: Solve for x
   x = 33,858,402.72/6,287.72
6. Step 6: Final answer
   x = 5,384.85