Finding the Fourth Proportional to 2,143.05, 2,956.41 and 1,397.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.05 : 2,956.41 = 1,397.67 : x
2. Step 2: Convert to fraction form
   2,143.05/2,956.41 = 1,397.67/x
3. Step 3: Cross multiply
   2,143.05x = 2,956.41 × 1,397.67
4. Step 4: Simplify right side
   2,143.05x = 4,132,085.56
5. Step 5: Solve for x
   x = 4,132,085.56/2,143.05
6. Step 6: Final answer
   x = 1,928.13