Finding the Fourth Proportional to 3,112.04, 4,667.34 and 920.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,112.04 : 4,667.34 = 920.18 : x
2. Step 2: Convert to fraction form
   3,112.04/4,667.34 = 920.18/x
3. Step 3: Cross multiply
   3,112.04x = 4,667.34 × 920.18
4. Step 4: Simplify right side
   3,112.04x = 4,294,792.92
5. Step 5: Solve for x
   x = 4,294,792.92/3,112.04
6. Step 6: Final answer
   x = 1,380.06