Finding the Fourth Proportional to 1,618.50, 2,233.77 and 919.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.50 : 2,233.77 = 919.89 : x
2. Step 2: Convert to fraction form
   1,618.50/2,233.77 = 919.89/x
3. Step 3: Cross multiply
   1,618.50x = 2,233.77 × 919.89
4. Step 4: Simplify right side
   1,618.50x = 2,054,822.69
5. Step 5: Solve for x
   x = 2,054,822.69/1,618.50
6. Step 6: Final answer
   x = 1,269.58