Finding the Fourth Proportional to 2,769.95, 4,153.91 and 920.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,769.95 : 4,153.91 = 920.72 : x
2. Step 2: Convert to fraction form
   2,769.95/4,153.91 = 920.72/x
3. Step 3: Cross multiply
   2,769.95x = 4,153.91 × 920.72
4. Step 4: Simplify right side
   2,769.95x = 3,824,593.80
5. Step 5: Solve for x
   x = 3,824,593.80/2,769.95
6. Step 6: Final answer
   x = 1,380.74