Finding the Fourth Proportional to 1,618.54, 2,233.74 and 920.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.54 : 2,233.74 = 920.05 : x
2. Step 2: Convert to fraction form
   1,618.54/2,233.74 = 920.05/x
3. Step 3: Cross multiply
   1,618.54x = 2,233.74 × 920.05
4. Step 4: Simplify right side
   1,618.54x = 2,055,152.49
5. Step 5: Solve for x
   x = 2,055,152.49/1,618.54
6. Step 6: Final answer
   x = 1,269.76