Finding the Fourth Proportional to 2,858.82, 4,288.86 and 910.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.82 : 4,288.86 = 910.98 : x
2. Step 2: Convert to fraction form
   2,858.82/4,288.86 = 910.98/x
3. Step 3: Cross multiply
   2,858.82x = 4,288.86 × 910.98
4. Step 4: Simplify right side
   2,858.82x = 3,907,065.68
5. Step 5: Solve for x
   x = 3,907,065.68/2,858.82
6. Step 6: Final answer
   x = 1,366.67