Finding the Fourth Proportional to 1,456.50, 2,186.13 and 909.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.50 : 2,186.13 = 909.72 : x
2. Step 2: Convert to fraction form
   1,456.50/2,186.13 = 909.72/x
3. Step 3: Cross multiply
   1,456.50x = 2,186.13 × 909.72
4. Step 4: Simplify right side
   1,456.50x = 1,988,766.18
5. Step 5: Solve for x
   x = 1,988,766.18/1,456.50
6. Step 6: Final answer
   x = 1,365.44