Finding the Fourth Proportional to 2,240.69, 3,091.18 and 1,399.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240.69 : 3,091.18 = 1,399.93 : x
2. Step 2: Convert to fraction form
   2,240.69/3,091.18 = 1,399.93/x
3. Step 3: Cross multiply
   2,240.69x = 3,091.18 × 1,399.93
4. Step 4: Simplify right side
   2,240.69x = 4,327,435.62
5. Step 5: Solve for x
   x = 4,327,435.62/2,240.69
6. Step 6: Final answer
   x = 1,931.30