Finding the Fourth Proportional to 2,667.72, 4,002.48 and 819.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,667.72 : 4,002.48 = 819.12 : x
2. Step 2: Convert to fraction form
   2,667.72/4,002.48 = 819.12/x
3. Step 3: Cross multiply
   2,667.72x = 4,002.48 × 819.12
4. Step 4: Simplify right side
   2,667.72x = 3,278,511.42
5. Step 5: Solve for x
   x = 3,278,511.42/2,667.72
6. Step 6: Final answer
   x = 1,228.96