Finding the Fourth Proportional to 1,225.50, 1,690.83 and 727.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225.50 : 1,690.83 = 727.89 : x
2. Step 2: Convert to fraction form
   1,225.50/1,690.83 = 727.89/x
3. Step 3: Cross multiply
   1,225.50x = 1,690.83 × 727.89
4. Step 4: Simplify right side
   1,225.50x = 1,230,738.25
5. Step 5: Solve for x
   x = 1,230,738.25/1,225.50
6. Step 6: Final answer
   x = 1,004.27