Finding the Fourth Proportional to 1,662.05, 2,280.27 and 1,618.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.05 : 2,280.27 = 1,618.94 : x
2. Step 2: Convert to fraction form
   1,662.05/2,280.27 = 1,618.94/x
3. Step 3: Cross multiply
   1,662.05x = 2,280.27 × 1,618.94
4. Step 4: Simplify right side
   1,662.05x = 3,691,608.91
5. Step 5: Solve for x
   x = 3,691,608.91/1,662.05
6. Step 6: Final answer
   x = 2,221.12