Finding the Fourth Proportional to 1,686.72, 2,328.20 and 1,371.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.72 : 2,328.20 = 1,371.73 : x
2. Step 2: Convert to fraction form
   1,686.72/2,328.20 = 1,371.73/x
3. Step 3: Cross multiply
   1,686.72x = 2,328.20 × 1,371.73
4. Step 4: Simplify right side
   1,686.72x = 3,193,661.79
5. Step 5: Solve for x
   x = 3,193,661.79/1,686.72
6. Step 6: Final answer
   x = 1,893.42