Finding the Fourth Proportional to 1,687.40, 2,329.24 and 1,248.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.40 : 2,329.24 = 1,248.82 : x
2. Step 2: Convert to fraction form
   1,687.40/2,329.24 = 1,248.82/x
3. Step 3: Cross multiply
   1,687.40x = 2,329.24 × 1,248.82
4. Step 4: Simplify right side
   1,687.40x = 2,908,801.50
5. Step 5: Solve for x
   x = 2,908,801.50/1,687.40
6. Step 6: Final answer
   x = 1,723.84