Finding the Fourth Proportional to 2,950.75, 4,426.71 and 870.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,950.75 : 4,426.71 = 870.79 : x
2. Step 2: Convert to fraction form
   2,950.75/4,426.71 = 870.79/x
3. Step 3: Cross multiply
   2,950.75x = 4,426.71 × 870.79
4. Step 4: Simplify right side
   2,950.75x = 3,854,734.80
5. Step 5: Solve for x
   x = 3,854,734.80/2,950.75
6. Step 6: Final answer
   x = 1,306.36