Finding the Fourth Proportional to 1,618.71, 2,233.80 and 920.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.71 : 2,233.80 = 920.04 : x
2. Step 2: Convert to fraction form
   1,618.71/2,233.80 = 920.04/x
3. Step 3: Cross multiply
   1,618.71x = 2,233.80 × 920.04
4. Step 4: Simplify right side
   1,618.71x = 2,055,185.35
5. Step 5: Solve for x
   x = 2,055,185.35/1,618.71
6. Step 6: Final answer
   x = 1,269.64