Finding the Fourth Proportional to 3,388.10, 5,081.12 and 922.60

Step by Step Solution

1. Step 1: Write the proportion equation
   3,388.10 : 5,081.12 = 922.60 : x
2. Step 2: Convert to fraction form
   3,388.10/5,081.12 = 922.60/x
3. Step 3: Cross multiply
   3,388.10x = 5,081.12 × 922.60
4. Step 4: Simplify right side
   3,388.10x = 4,687,815.91
5. Step 5: Solve for x
   x = 4,687,815.91/3,388.10
6. Step 6: Final answer
   x = 1,383.61