Finding the Fourth Proportional to 2,571.72, 3,549.90 and 1,687.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.72 : 3,549.90 = 1,687.72 : x
2. Step 2: Convert to fraction form
   2,571.72/3,549.90 = 1,687.72/x
3. Step 3: Cross multiply
   2,571.72x = 3,549.90 × 1,687.72
4. Step 4: Simplify right side
   2,571.72x = 5,991,237.23
5. Step 5: Solve for x
   x = 5,991,237.23/2,571.72
6. Step 6: Final answer
   x = 2,329.66