Finding the Fourth Proportional to 5,687.92, 7,817.57 and 5,020.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,687.92 : 7,817.57 = 5,020.72 : x
2. Step 2: Convert to fraction form
   5,687.92/7,817.57 = 5,020.72/x
3. Step 3: Cross multiply
   5,687.92x = 7,817.57 × 5,020.72
4. Step 4: Simplify right side
   5,687.92x = 39,249,830.05
5. Step 5: Solve for x
   x = 39,249,830.05/5,687.92
6. Step 6: Final answer
   x = 6,900.56