Finding the Fourth Proportional to 1,499.42, 2,067.86 and 939.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.42 : 2,067.86 = 939.96 : x
2. Step 2: Convert to fraction form
   1,499.42/2,067.86 = 939.96/x
3. Step 3: Cross multiply
   1,499.42x = 2,067.86 × 939.96
4. Step 4: Simplify right side
   1,499.42x = 1,943,708.04
5. Step 5: Solve for x
   x = 1,943,708.04/1,499.42
6. Step 6: Final answer
   x = 1,296.30