Finding the Fourth Proportional to 2,568.59, 3,852.89 and 620.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.59 : 3,852.89 = 620.79 : x
2. Step 2: Convert to fraction form
   2,568.59/3,852.89 = 620.79/x
3. Step 3: Cross multiply
   2,568.59x = 3,852.89 × 620.79
4. Step 4: Simplify right side
   2,568.59x = 2,391,832.48
5. Step 5: Solve for x
   x = 2,391,832.48/2,568.59
6. Step 6: Final answer
   x = 931.19