Finding the Fourth Proportional to 2,143.56, 3,218.06 and 1,656.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.56 : 3,218.06 = 1,656.92 : x
2. Step 2: Convert to fraction form
   2,143.56/3,218.06 = 1,656.92/x
3. Step 3: Cross multiply
   2,143.56x = 3,218.06 × 1,656.92
4. Step 4: Simplify right side
   2,143.56x = 5,332,067.98
5. Step 5: Solve for x
   x = 5,332,067.98/2,143.56
6. Step 6: Final answer
   x = 2,487.48