Finding the Fourth Proportional to 1,618.82, 2,233.74 and 920.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.82 : 2,233.74 = 920.18 : x
2. Step 2: Convert to fraction form
   1,618.82/2,233.74 = 920.18/x
3. Step 3: Cross multiply
   1,618.82x = 2,233.74 × 920.18
4. Step 4: Simplify right side
   1,618.82x = 2,055,442.87
5. Step 5: Solve for x
   x = 2,055,442.87/1,618.82
6. Step 6: Final answer
   x = 1,269.72