Finding the Fourth Proportional to 2,769.69, 4,153.72 and 920.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,769.69 : 4,153.72 = 920.39 : x
2. Step 2: Convert to fraction form
   2,769.69/4,153.72 = 920.39/x
3. Step 3: Cross multiply
   2,769.69x = 4,153.72 × 920.39
4. Step 4: Simplify right side
   2,769.69x = 3,823,042.35
5. Step 5: Solve for x
   x = 3,823,042.35/2,769.69
6. Step 6: Final answer
   x = 1,380.31