Finding the Fourth Proportional to 2,939.00, 4,407.89 and 858.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,939.00 : 4,407.89 = 858.74 : x
2. Step 2: Convert to fraction form
   2,939.00/4,407.89 = 858.74/x
3. Step 3: Cross multiply
   2,939.00x = 4,407.89 × 858.74
4. Step 4: Simplify right side
   2,939.00x = 3,785,205.13
5. Step 5: Solve for x
   x = 3,785,205.13/2,939.00
6. Step 6: Final answer
   x = 1,287.92