Finding the Fourth Proportional to 1,498.14, 2,067.90 and 1,218.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,498.14 : 2,067.90 = 1,218.15 : x
2. Step 2: Convert to fraction form
   1,498.14/2,067.90 = 1,218.15/x
3. Step 3: Cross multiply
   1,498.14x = 2,067.90 × 1,218.15
4. Step 4: Simplify right side
   1,498.14x = 2,519,012.39
5. Step 5: Solve for x
   x = 2,519,012.39/1,498.14
6. Step 6: Final answer
   x = 1,681.43