Finding the Fourth Proportional to 1,687.76, 2,327.52 and 1,571.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.76 : 2,327.52 = 1,571.36 : x
2. Step 2: Convert to fraction form
   1,687.76/2,327.52 = 1,571.36/x
3. Step 3: Cross multiply
   1,687.76x = 2,327.52 × 1,571.36
4. Step 4: Simplify right side
   1,687.76x = 3,657,371.83
5. Step 5: Solve for x
   x = 3,657,371.83/1,687.76
6. Step 6: Final answer
   x = 2,167.00