Finding the Fourth Proportional to 1,665.16, 2,297.87 and 919.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.16 : 2,297.87 = 919.11 : x
2. Step 2: Convert to fraction form
   1,665.16/2,297.87 = 919.11/x
3. Step 3: Cross multiply
   1,665.16x = 2,297.87 × 919.11
4. Step 4: Simplify right side
   1,665.16x = 2,112,002.76
5. Step 5: Solve for x
   x = 2,112,002.76/1,665.16
6. Step 6: Final answer
   x = 1,268.35