Finding the Fourth Proportional to 2,769.79, 4,151.72 and 1,380.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,769.79 : 4,151.72 = 1,380.38 : x
2. Step 2: Convert to fraction form
   2,769.79/4,151.72 = 1,380.38/x
3. Step 3: Cross multiply
   2,769.79x = 4,151.72 × 1,380.38
4. Step 4: Simplify right side
   2,769.79x = 5,730,954.73
5. Step 5: Solve for x
   x = 5,730,954.73/2,769.79
6. Step 6: Final answer
   x = 2,069.10