Finding the Fourth Proportional to 2,209.65, 3,312.05 and 910.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.65 : 3,312.05 = 910.41 : x
2. Step 2: Convert to fraction form
   2,209.65/3,312.05 = 910.41/x
3. Step 3: Cross multiply
   2,209.65x = 3,312.05 × 910.41
4. Step 4: Simplify right side
   2,209.65x = 3,015,318.89
5. Step 5: Solve for x
   x = 3,015,318.89/2,209.65
6. Step 6: Final answer
   x = 1,364.61