Finding the Fourth Proportional to 1,805.15, 2,491.05 and 1,019.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,805.15 : 2,491.05 = 1,019.18 : x
2. Step 2: Convert to fraction form
   1,805.15/2,491.05 = 1,019.18/x
3. Step 3: Cross multiply
   1,805.15x = 2,491.05 × 1,019.18
4. Step 4: Simplify right side
   1,805.15x = 2,538,834.57
5. Step 5: Solve for x
   x = 2,538,834.57/1,805.15
6. Step 6: Final answer
   x = 1,406.44