Finding the Fourth Proportional to 2,315.86, 3,193.82 and 1,687.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.86 : 3,193.82 = 1,687.85 : x
2. Step 2: Convert to fraction form
   2,315.86/3,193.82 = 1,687.85/x
3. Step 3: Cross multiply
   2,315.86x = 3,193.82 × 1,687.85
4. Step 4: Simplify right side
   2,315.86x = 5,390,694.96
5. Step 5: Solve for x
   x = 5,390,694.96/2,315.86
6. Step 6: Final answer
   x = 2,327.73