Finding the Fourth Proportional to 3,111.83, 4,668.54 and 920.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.83 : 4,668.54 = 920.56 : x
2. Step 2: Convert to fraction form
   3,111.83/4,668.54 = 920.56/x
3. Step 3: Cross multiply
   3,111.83x = 4,668.54 × 920.56
4. Step 4: Simplify right side
   3,111.83x = 4,297,656.06
5. Step 5: Solve for x
   x = 4,297,656.06/3,111.83
6. Step 6: Final answer
   x = 1,381.07