Finding the Fourth Proportional to 2,665.92, 3,679.20 and 1,618.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.92 : 3,679.20 = 1,618.56 : x
2. Step 2: Convert to fraction form
   2,665.92/3,679.20 = 1,618.56/x
3. Step 3: Cross multiply
   2,665.92x = 3,679.20 × 1,618.56
4. Step 4: Simplify right side
   2,665.92x = 5,955,005.95
5. Step 5: Solve for x
   x = 5,955,005.95/2,665.92
6. Step 6: Final answer
   x = 2,233.75