Finding the Fourth Proportional to 1,715.36, 2,371.86 and 1,687.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.36 : 2,371.86 = 1,687.59 : x
2. Step 2: Convert to fraction form
   1,715.36/2,371.86 = 1,687.59/x
3. Step 3: Cross multiply
   1,715.36x = 2,371.86 × 1,687.59
4. Step 4: Simplify right side
   1,715.36x = 4,002,727.22
5. Step 5: Solve for x
   x = 4,002,727.22/1,715.36
6. Step 6: Final answer
   x = 2,333.47