Finding the Fourth Proportional to 1,228.92, 1,695.72 and 731.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.92 : 1,695.72 = 731.55 : x
2. Step 2: Convert to fraction form
   1,228.92/1,695.72 = 731.55/x
3. Step 3: Cross multiply
   1,228.92x = 1,695.72 × 731.55
4. Step 4: Simplify right side
   1,228.92x = 1,240,499.41
5. Step 5: Solve for x
   x = 1,240,499.41/1,228.92
6. Step 6: Final answer
   x = 1,009.42