Finding the Fourth Proportional to 2,082.43, 2,870.21 and 1,905.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,082.43 : 2,870.21 = 1,905.88 : x
2. Step 2: Convert to fraction form
   2,082.43/2,870.21 = 1,905.88/x
3. Step 3: Cross multiply
   2,082.43x = 2,870.21 × 1,905.88
4. Step 4: Simplify right side
   2,082.43x = 5,470,273.45
5. Step 5: Solve for x
   x = 5,470,273.45/2,082.43
6. Step 6: Final answer
   x = 2,626.87