Finding the Fourth Proportional to 1,665.03, 2,297.78 and 919

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.03 : 2,297.78 = 919 : x
2. Step 2: Convert to fraction form
   1,665.03/2,297.78 = 919/x
3. Step 3: Cross multiply
   1,665.03x = 2,297.78 × 919
4. Step 4: Simplify right side
   1,665.03x = 2,111,659.82
5. Step 5: Solve for x
   x = 2,111,659.82/1,665.03
6. Step 6: Final answer
   x = 1,268.24