Finding the Fourth Proportional to 2,003.28, 3,004.82 and 771.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,003.28 : 3,004.82 = 771.28 : x
2. Step 2: Convert to fraction form
   2,003.28/3,004.82 = 771.28/x
3. Step 3: Cross multiply
   2,003.28x = 3,004.82 × 771.28
4. Step 4: Simplify right side
   2,003.28x = 2,317,557.57
5. Step 5: Solve for x
   x = 2,317,557.57/2,003.28
6. Step 6: Final answer
   x = 1,156.88