Finding the Fourth Proportional to 3,443.32, 5,160.62 and 1,687.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,443.32 : 5,160.62 = 1,687.91 : x
2. Step 2: Convert to fraction form
   3,443.32/5,160.62 = 1,687.91/x
3. Step 3: Cross multiply
   3,443.32x = 5,160.62 × 1,687.91
4. Step 4: Simplify right side
   3,443.32x = 8,710,643.10
5. Step 5: Solve for x
   x = 8,710,643.10/3,443.32
6. Step 6: Final answer
   x = 2,529.72