Finding the Fourth Proportional to 1,499.22, 2,067.36 and 1,290.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.22 : 2,067.36 = 1,290.06 : x
2. Step 2: Convert to fraction form
   1,499.22/2,067.36 = 1,290.06/x
3. Step 3: Cross multiply
   1,499.22x = 2,067.36 × 1,290.06
4. Step 4: Simplify right side
   1,499.22x = 2,667,018.44
5. Step 5: Solve for x
   x = 2,667,018.44/1,499.22
6. Step 6: Final answer
   x = 1,778.94