Finding the Fourth Proportional to 2,064.25, 3,091.09 and 1,138.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,064.25 : 3,091.09 = 1,138.78 : x
2. Step 2: Convert to fraction form
   2,064.25/3,091.09 = 1,138.78/x
3. Step 3: Cross multiply
   2,064.25x = 3,091.09 × 1,138.78
4. Step 4: Simplify right side
   2,064.25x = 3,520,058.38
5. Step 5: Solve for x
   x = 3,520,058.38/2,064.25
6. Step 6: Final answer
   x = 1,705.25