Finding the Fourth Proportional to 2,764.94, 4,147.56 and 817.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,764.94 : 4,147.56 = 817.30 : x
2. Step 2: Convert to fraction form
   2,764.94/4,147.56 = 817.30/x
3. Step 3: Cross multiply
   2,764.94x = 4,147.56 × 817.30
4. Step 4: Simplify right side
   2,764.94x = 3,389,790.42
5. Step 5: Solve for x
   x = 3,389,790.42/2,764.94
6. Step 6: Final answer
   x = 1,225.99