Finding the Fourth Proportional to 2,069.78, 3,106.04 and 1,377.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.78 : 3,106.04 = 1,377.23 : x
2. Step 2: Convert to fraction form
   2,069.78/3,106.04 = 1,377.23/x
3. Step 3: Cross multiply
   2,069.78x = 3,106.04 × 1,377.23
4. Step 4: Simplify right side
   2,069.78x = 4,277,709.05
5. Step 5: Solve for x
   x = 4,277,709.05/2,069.78
6. Step 6: Final answer
   x = 2,066.75