Finding the Fourth Proportional to 6,857.88, 10,272.46 and 5,685.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,857.88 : 10,272.46 = 5,685.10 : x
2. Step 2: Convert to fraction form
   6,857.88/10,272.46 = 5,685.10/x
3. Step 3: Cross multiply
   6,857.88x = 10,272.46 × 5,685.10
4. Step 4: Simplify right side
   6,857.88x = 58,399,962.35
5. Step 5: Solve for x
   x = 58,399,962.35/6,857.88
6. Step 6: Final answer
   x = 8,515.75