Finding the Fourth Proportional to 2,219.26, 3,061.59 and 1,287.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,219.26 : 3,061.59 = 1,287.22 : x
2. Step 2: Convert to fraction form
   2,219.26/3,061.59 = 1,287.22/x
3. Step 3: Cross multiply
   2,219.26x = 3,061.59 × 1,287.22
4. Step 4: Simplify right side
   2,219.26x = 3,940,939.88
5. Step 5: Solve for x
   x = 3,940,939.88/2,219.26
6. Step 6: Final answer
   x = 1,775.79