Finding the Fourth Proportional to 2,143.42, 2,956.32 and 1,398.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.42 : 2,956.32 = 1,398.04 : x
2. Step 2: Convert to fraction form
   2,143.42/2,956.32 = 1,398.04/x
3. Step 3: Cross multiply
   2,143.42x = 2,956.32 × 1,398.04
4. Step 4: Simplify right side
   2,143.42x = 4,133,053.61
5. Step 5: Solve for x
   x = 4,133,053.61/2,143.42
6. Step 6: Final answer
   x = 1,928.25