Finding the Fourth Proportional to 3,111.81, 4,667.10 and 920.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.81 : 4,667.10 = 920.04 : x
2. Step 2: Convert to fraction form
   3,111.81/4,667.10 = 920.04/x
3. Step 3: Cross multiply
   3,111.81x = 4,667.10 × 920.04
4. Step 4: Simplify right side
   3,111.81x = 4,293,918.68
5. Step 5: Solve for x
   x = 4,293,918.68/3,111.81
6. Step 6: Final answer
   x = 1,379.88