Finding the Fourth Proportional to 2,240.39, 3,360.78 and 1,145.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,240.39 : 3,360.78 = 1,145.67 : x
2. Step 2: Convert to fraction form
   2,240.39/3,360.78 = 1,145.67/x
3. Step 3: Cross multiply
   2,240.39x = 3,360.78 × 1,145.67
4. Step 4: Simplify right side
   2,240.39x = 3,850,344.82
5. Step 5: Solve for x
   x = 3,850,344.82/2,240.39
6. Step 6: Final answer
   x = 1,718.61