Finding the Fourth Proportional to 2,870.91, 4,306.21 and 762.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.91 : 4,306.21 = 762.48 : x
2. Step 2: Convert to fraction form
   2,870.91/4,306.21 = 762.48/x
3. Step 3: Cross multiply
   2,870.91x = 4,306.21 × 762.48
4. Step 4: Simplify right side
   2,870.91x = 3,283,399.00
5. Step 5: Solve for x
   x = 3,283,399.00/2,870.91
6. Step 6: Final answer
   x = 1,143.68