Finding the Fourth Proportional to 1,805.64, 2,491.59 and 1,019.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,805.64 : 2,491.59 = 1,019.69 : x
2. Step 2: Convert to fraction form
   1,805.64/2,491.59 = 1,019.69/x
3. Step 3: Cross multiply
   1,805.64x = 2,491.59 × 1,019.69
4. Step 4: Simplify right side
   1,805.64x = 2,540,641.51
5. Step 5: Solve for x
   x = 2,540,641.51/1,805.64
6. Step 6: Final answer
   x = 1,407.06