Finding the Fourth Proportional to 3,111.35, 4,667.71 and 920.26

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.35 : 4,667.71 = 920.26 : x
2. Step 2: Convert to fraction form
   3,111.35/4,667.71 = 920.26/x
3. Step 3: Cross multiply
   3,111.35x = 4,667.71 × 920.26
4. Step 4: Simplify right side
   3,111.35x = 4,295,492.83
5. Step 5: Solve for x
   x = 4,295,492.83/3,111.35
6. Step 6: Final answer
   x = 1,380.59