Finding the Fourth Proportional to 6,290.55, 8,687.16 and 5,700.06

Step by Step Solution

1. Step 1: Write the proportion equation
   6,290.55 : 8,687.16 = 5,700.06 : x
2. Step 2: Convert to fraction form
   6,290.55/8,687.16 = 5,700.06/x
3. Step 3: Cross multiply
   6,290.55x = 8,687.16 × 5,700.06
4. Step 4: Simplify right side
   6,290.55x = 49,517,333.23
5. Step 5: Solve for x
   x = 49,517,333.23/6,290.55
6. Step 6: Final answer
   x = 7,871.70