Finding the Fourth Proportional to 2,288.89, 3,432.05 and 728.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.89 : 3,432.05 = 728.62 : x
2. Step 2: Convert to fraction form
   2,288.89/3,432.05 = 728.62/x
3. Step 3: Cross multiply
   2,288.89x = 3,432.05 × 728.62
4. Step 4: Simplify right side
   2,288.89x = 2,500,660.27
5. Step 5: Solve for x
   x = 2,500,660.27/2,288.89
6. Step 6: Final answer
   x = 1,092.52