Finding the Fourth Proportional to 1,686.48, 2,326.94 and 1,023.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.48 : 2,326.94 = 1,023.31 : x
2. Step 2: Convert to fraction form
   1,686.48/2,326.94 = 1,023.31/x
3. Step 3: Cross multiply
   1,686.48x = 2,326.94 × 1,023.31
4. Step 4: Simplify right side
   1,686.48x = 2,381,175.85
5. Step 5: Solve for x
   x = 2,381,175.85/1,686.48
6. Step 6: Final answer
   x = 1,411.92