Finding the Fourth Proportional to 1,618.76, 2,233.92 and 920.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.76 : 2,233.92 = 920.16 : x
2. Step 2: Convert to fraction form
   1,618.76/2,233.92 = 920.16/x
3. Step 3: Cross multiply
   1,618.76x = 2,233.92 × 920.16
4. Step 4: Simplify right side
   1,618.76x = 2,055,563.83
5. Step 5: Solve for x
   x = 2,055,563.83/1,618.76
6. Step 6: Final answer
   x = 1,269.84