Finding the Fourth Proportional to 1,805.61, 2,491.32 and 1,019.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,805.61 : 2,491.32 = 1,019.51 : x
2. Step 2: Convert to fraction form
   1,805.61/2,491.32 = 1,019.51/x
3. Step 3: Cross multiply
   1,805.61x = 2,491.32 × 1,019.51
4. Step 4: Simplify right side
   1,805.61x = 2,539,925.65
5. Step 5: Solve for x
   x = 2,539,925.65/1,805.61
6. Step 6: Final answer
   x = 1,406.69