Finding the Fourth Proportional to 1,667.20, 2,299.92 and 1,078.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.20 : 2,299.92 = 1,078.24 : x
2. Step 2: Convert to fraction form
   1,667.20/2,299.92 = 1,078.24/x
3. Step 3: Cross multiply
   1,667.20x = 2,299.92 × 1,078.24
4. Step 4: Simplify right side
   1,667.20x = 2,479,865.74
5. Step 5: Solve for x
   x = 2,479,865.74/1,667.20
6. Step 6: Final answer
   x = 1,487.44