Finding the Fourth Proportional to 2,288.06, 3,432.05 and 728.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,288.06 : 3,432.05 = 728.15 : x
2. Step 2: Convert to fraction form
   2,288.06/3,432.05 = 728.15/x
3. Step 3: Cross multiply
   2,288.06x = 3,432.05 × 728.15
4. Step 4: Simplify right side
   2,288.06x = 2,499,054.88
5. Step 5: Solve for x
   x = 2,499,054.88/2,288.06
6. Step 6: Final answer
   x = 1,092.22