Finding the Fourth Proportional to 2,123.92, 3,182.24 and 1,686.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.92 : 3,182.24 = 1,686.52 : x
2. Step 2: Convert to fraction form
   2,123.92/3,182.24 = 1,686.52/x
3. Step 3: Cross multiply
   2,123.92x = 3,182.24 × 1,686.52
4. Step 4: Simplify right side
   2,123.92x = 5,366,910.11
5. Step 5: Solve for x
   x = 5,366,910.11/2,123.92
6. Step 6: Final answer
   x = 2,526.89