Finding the Fourth Proportional to 2,156.24, 3,231.30 and 1,667

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.24 : 3,231.30 = 1,667 : x
2. Step 2: Convert to fraction form
   2,156.24/3,231.30 = 1,667/x
3. Step 3: Cross multiply
   2,156.24x = 3,231.30 × 1,667
4. Step 4: Simplify right side
   2,156.24x = 5,386,577.10
5. Step 5: Solve for x
   x = 5,386,577.10/2,156.24
6. Step 6: Final answer
   x = 2,498.13