Finding the Fourth Proportional to 2,769.94, 4,155.50 and 920.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,769.94 : 4,155.50 = 920.96 : x
2. Step 2: Convert to fraction form
   2,769.94/4,155.50 = 920.96/x
3. Step 3: Cross multiply
   2,769.94x = 4,155.50 × 920.96
4. Step 4: Simplify right side
   2,769.94x = 3,827,049.28
5. Step 5: Solve for x
   x = 3,827,049.28/2,769.94
6. Step 6: Final answer
   x = 1,381.64