Finding the Fourth Proportional to 1,665.11, 2,297.87 and 919.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.11 : 2,297.87 = 919.06 : x
2. Step 2: Convert to fraction form
   1,665.11/2,297.87 = 919.06/x
3. Step 3: Cross multiply
   1,665.11x = 2,297.87 × 919.06
4. Step 4: Simplify right side
   1,665.11x = 2,111,886.43
5. Step 5: Solve for x
   x = 2,111,886.43/1,665.11
6. Step 6: Final answer
   x = 1,268.32