Finding the Fourth Proportional to 2,667.14, 4,001.31 and 935.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.14 : 4,001.31 = 935.78 : x
2. Step 2: Convert to fraction form
   2,667.14/4,001.31 = 935.78/x
3. Step 3: Cross multiply
   2,667.14x = 4,001.31 × 935.78
4. Step 4: Simplify right side
   2,667.14x = 3,744,345.87
5. Step 5: Solve for x
   x = 3,744,345.87/2,667.14
6. Step 6: Final answer
   x = 1,403.88