Finding the Fourth Proportional to 1,665.43, 2,298.41 and 919.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.43 : 2,298.41 = 919.42 : x
2. Step 2: Convert to fraction form
   1,665.43/2,298.41 = 919.42/x
3. Step 3: Cross multiply
   1,665.43x = 2,298.41 × 919.42
4. Step 4: Simplify right side
   1,665.43x = 2,113,204.12
5. Step 5: Solve for x
   x = 2,113,204.12/1,665.43
6. Step 6: Final answer
   x = 1,268.86