Finding the Fourth Proportional to 2,146.32, 3,215.76 and 1,687.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.32 : 3,215.76 = 1,687.04 : x
2. Step 2: Convert to fraction form
   2,146.32/3,215.76 = 1,687.04/x
3. Step 3: Cross multiply
   2,146.32x = 3,215.76 × 1,687.04
4. Step 4: Simplify right side
   2,146.32x = 5,425,115.75
5. Step 5: Solve for x
   x = 5,425,115.75/2,146.32
6. Step 6: Final answer
   x = 2,527.64