Finding the Fourth Proportional to 2,143.50, 3,214.42 and 910.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.50 : 3,214.42 = 910.96 : x
2. Step 2: Convert to fraction form
   2,143.50/3,214.42 = 910.96/x
3. Step 3: Cross multiply
   2,143.50x = 3,214.42 × 910.96
4. Step 4: Simplify right side
   2,143.50x = 2,928,208.04
5. Step 5: Solve for x
   x = 2,928,208.04/2,143.50
6. Step 6: Final answer
   x = 1,366.09