Finding the Fourth Proportional to 3,780.78, 5,667.37 and 1,440.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,780.78 : 5,667.37 = 1,440.18 : x
2. Step 2: Convert to fraction form
   3,780.78/5,667.37 = 1,440.18/x
3. Step 3: Cross multiply
   3,780.78x = 5,667.37 × 1,440.18
4. Step 4: Simplify right side
   3,780.78x = 8,162,029.33
5. Step 5: Solve for x
   x = 8,162,029.33/3,780.78
6. Step 6: Final answer
   x = 2,158.82