Finding the Fourth Proportional to 2,042.83, 3,065.25 and 810.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,042.83 : 3,065.25 = 810.21 : x
2. Step 2: Convert to fraction form
   2,042.83/3,065.25 = 810.21/x
3. Step 3: Cross multiply
   2,042.83x = 3,065.25 × 810.21
4. Step 4: Simplify right side
   2,042.83x = 2,483,496.20
5. Step 5: Solve for x
   x = 2,483,496.20/2,042.83
6. Step 6: Final answer
   x = 1,215.72