Finding the Fourth Proportional to 5,570.50, 7,687.29 and 3,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,570.50 : 7,687.29 = 3,086.50 : x
2. Step 2: Convert to fraction form
   5,570.50/7,687.29 = 3,086.50/x
3. Step 3: Cross multiply
   5,570.50x = 7,687.29 × 3,086.50
4. Step 4: Simplify right side
   5,570.50x = 23,726,820.59
5. Step 5: Solve for x
   x = 23,726,820.59/5,570.50
6. Step 6: Final answer
   x = 4,259.37