Finding the Fourth Proportional to 2,288.18, 3,432.32 and 728.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.18 : 3,432.32 = 728.18 : x
2. Step 2: Convert to fraction form
   2,288.18/3,432.32 = 728.18/x
3. Step 3: Cross multiply
   2,288.18x = 3,432.32 × 728.18
4. Step 4: Simplify right side
   2,288.18x = 2,499,346.78
5. Step 5: Solve for x
   x = 2,499,346.78/2,288.18
6. Step 6: Final answer
   x = 1,092.29