Finding the Fourth Proportional to 2,040.81, 2,816.35 and 1,109.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.81 : 2,816.35 = 1,109.31 : x
2. Step 2: Convert to fraction form
   2,040.81/2,816.35 = 1,109.31/x
3. Step 3: Cross multiply
   2,040.81x = 2,816.35 × 1,109.31
4. Step 4: Simplify right side
   2,040.81x = 3,124,206.71
5. Step 5: Solve for x
   x = 3,124,206.71/2,040.81
6. Step 6: Final answer
   x = 1,530.86