Finding the Fourth Proportional to 2,209.32, 3,314.25 and 911.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.32 : 3,314.25 = 911.16 : x
2. Step 2: Convert to fraction form
   2,209.32/3,314.25 = 911.16/x
3. Step 3: Cross multiply
   2,209.32x = 3,314.25 × 911.16
4. Step 4: Simplify right side
   2,209.32x = 3,019,812.03
5. Step 5: Solve for x
   x = 3,019,812.03/2,209.32
6. Step 6: Final answer
   x = 1,366.85