Finding the Fourth Proportional to 2,209.82, 3,314.06 and 728.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.82 : 3,314.06 = 728.76 : x
2. Step 2: Convert to fraction form
   2,209.82/3,314.06 = 728.76/x
3. Step 3: Cross multiply
   2,209.82x = 3,314.06 × 728.76
4. Step 4: Simplify right side
   2,209.82x = 2,415,150.72
5. Step 5: Solve for x
   x = 2,415,150.72/2,209.82
6. Step 6: Final answer
   x = 1,092.92