Finding the Fourth Proportional to 1,718.34, 2,371.87 and 1,222.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,718.34 : 2,371.87 = 1,222.42 : x
2. Step 2: Convert to fraction form
   1,718.34/2,371.87 = 1,222.42/x
3. Step 3: Cross multiply
   1,718.34x = 2,371.87 × 1,222.42
4. Step 4: Simplify right side
   1,718.34x = 2,899,421.33
5. Step 5: Solve for x
   x = 2,899,421.33/1,718.34
6. Step 6: Final answer
   x = 1,687.34