Finding the Fourth Proportional to 1,662.03, 2,292.60 and 989.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.03 : 2,292.60 = 989.59 : x
2. Step 2: Convert to fraction form
   1,662.03/2,292.60 = 989.59/x
3. Step 3: Cross multiply
   1,662.03x = 2,292.60 × 989.59
4. Step 4: Simplify right side
   1,662.03x = 2,268,734.03
5. Step 5: Solve for x
   x = 2,268,734.03/1,662.03
6. Step 6: Final answer
   x = 1,365.04