Finding the Fourth Proportional to 1,665.36, 2,298.24 and 919.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.36 : 2,298.24 = 919.35 : x
2. Step 2: Convert to fraction form
   1,665.36/2,298.24 = 919.35/x
3. Step 3: Cross multiply
   1,665.36x = 2,298.24 × 919.35
4. Step 4: Simplify right side
   1,665.36x = 2,112,886.94
5. Step 5: Solve for x
   x = 2,112,886.94/1,665.36
6. Step 6: Final answer
   x = 1,268.73