Finding the Fourth Proportional to 1,665.45, 2,298.38 and 919.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.45 : 2,298.38 = 919.49 : x
2. Step 2: Convert to fraction form
   1,665.45/2,298.38 = 919.49/x
3. Step 3: Cross multiply
   1,665.45x = 2,298.38 × 919.49
4. Step 4: Simplify right side
   1,665.45x = 2,113,321.34
5. Step 5: Solve for x
   x = 2,113,321.34/1,665.45
6. Step 6: Final answer
   x = 1,268.92