Finding the Fourth Proportional to 2,870.94, 4,282.21 and 2,608.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.94 : 4,282.21 = 2,608.50 : x
2. Step 2: Convert to fraction form
   2,870.94/4,282.21 = 2,608.50/x
3. Step 3: Cross multiply
   2,870.94x = 4,282.21 × 2,608.50
4. Step 4: Simplify right side
   2,870.94x = 11,170,144.79
5. Step 5: Solve for x
   x = 11,170,144.79/2,870.94
6. Step 6: Final answer
   x = 3,890.76