Finding the Fourth Proportional to 1,456.66, 2,185.62 and 909.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.66 : 2,185.62 = 909.28 : x
2. Step 2: Convert to fraction form
   1,456.66/2,185.62 = 909.28/x
3. Step 3: Cross multiply
   1,456.66x = 2,185.62 × 909.28
4. Step 4: Simplify right side
   1,456.66x = 1,987,340.55
5. Step 5: Solve for x
   x = 1,987,340.55/1,456.66
6. Step 6: Final answer
   x = 1,364.31