Finding the Fourth Proportional to 2,868.91, 4,305.30 and 1,020.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,868.91 : 4,305.30 = 1,020.05 : x
2. Step 2: Convert to fraction form
   2,868.91/4,305.30 = 1,020.05/x
3. Step 3: Cross multiply
   2,868.91x = 4,305.30 × 1,020.05
4. Step 4: Simplify right side
   2,868.91x = 4,391,632.03
5. Step 5: Solve for x
   x = 4,391,632.03/2,868.91
6. Step 6: Final answer
   x = 1,530.77