Finding the Fourth Proportional to 2,667.20, 3,991.62 and 1,839.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.20 : 3,991.62 = 1,839.92 : x
2. Step 2: Convert to fraction form
   2,667.20/3,991.62 = 1,839.92/x
3. Step 3: Cross multiply
   2,667.20x = 3,991.62 × 1,839.92
4. Step 4: Simplify right side
   2,667.20x = 7,344,261.47
5. Step 5: Solve for x
   x = 7,344,261.47/2,667.20
6. Step 6: Final answer
   x = 2,753.55