Finding the Fourth Proportional to 1,618.45, 2,233.37 and 919.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.45 : 2,233.37 = 919.82 : x
2. Step 2: Convert to fraction form
   1,618.45/2,233.37 = 919.82/x
3. Step 3: Cross multiply
   1,618.45x = 2,233.37 × 919.82
4. Step 4: Simplify right side
   1,618.45x = 2,054,306.28
5. Step 5: Solve for x
   x = 2,054,306.28/1,618.45
6. Step 6: Final answer
   x = 1,269.31