Finding the Fourth Proportional to 2,044.30, 3,065.55 and 811.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,044.30 : 3,065.55 = 811.30 : x
2. Step 2: Convert to fraction form
   2,044.30/3,065.55 = 811.30/x
3. Step 3: Cross multiply
   2,044.30x = 3,065.55 × 811.30
4. Step 4: Simplify right side
   2,044.30x = 2,487,080.72
5. Step 5: Solve for x
   x = 2,487,080.72/2,044.30
6. Step 6: Final answer
   x = 1,216.59