Finding the Fourth Proportional to 1,449.94, 2,000.89 and 786.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,449.94 : 2,000.89 = 786.78 : x
2. Step 2: Convert to fraction form
   1,449.94/2,000.89 = 786.78/x
3. Step 3: Cross multiply
   1,449.94x = 2,000.89 × 786.78
4. Step 4: Simplify right side
   1,449.94x = 1,574,260.23
5. Step 5: Solve for x
   x = 1,574,260.23/1,449.94
6. Step 6: Final answer
   x = 1,085.75