Finding the Fourth Proportional to 2,810.50, 4,215.99 and 758.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,810.50 : 4,215.99 = 758.50 : x
2. Step 2: Convert to fraction form
   2,810.50/4,215.99 = 758.50/x
3. Step 3: Cross multiply
   2,810.50x = 4,215.99 × 758.50
4. Step 4: Simplify right side
   2,810.50x = 3,197,828.42
5. Step 5: Solve for x
   x = 3,197,828.42/2,810.50
6. Step 6: Final answer
   x = 1,137.81