Finding the Fourth Proportional to 2,958.05, 4,436.72 and 766.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,958.05 : 4,436.72 = 766.61 : x
2. Step 2: Convert to fraction form
   2,958.05/4,436.72 = 766.61/x
3. Step 3: Cross multiply
   2,958.05x = 4,436.72 × 766.61
4. Step 4: Simplify right side
   2,958.05x = 3,401,213.65
5. Step 5: Solve for x
   x = 3,401,213.65/2,958.05
6. Step 6: Final answer
   x = 1,149.82