Finding the Fourth Proportional to 1,618.78, 2,233.86 and 920.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.78 : 2,233.86 = 920.14 : x
2. Step 2: Convert to fraction form
   1,618.78/2,233.86 = 920.14/x
3. Step 3: Cross multiply
   1,618.78x = 2,233.86 × 920.14
4. Step 4: Simplify right side
   1,618.78x = 2,055,463.94
5. Step 5: Solve for x
   x = 2,055,463.94/1,618.78
6. Step 6: Final answer
   x = 1,269.76