Finding the Fourth Proportional to 2,109.04, 3,162.93 and 810.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.04 : 3,162.93 = 810.34 : x
2. Step 2: Convert to fraction form
   2,109.04/3,162.93 = 810.34/x
3. Step 3: Cross multiply
   2,109.04x = 3,162.93 × 810.34
4. Step 4: Simplify right side
   2,109.04x = 2,563,048.70
5. Step 5: Solve for x
   x = 2,563,048.70/2,109.04
6. Step 6: Final answer
   x = 1,215.27