Finding the Fourth Proportional to 1,665.45, 2,493.90 and 1,616.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.45 : 2,493.90 = 1,616.18 : x
2. Step 2: Convert to fraction form
   1,665.45/2,493.90 = 1,616.18/x
3. Step 3: Cross multiply
   1,665.45x = 2,493.90 × 1,616.18
4. Step 4: Simplify right side
   1,665.45x = 4,030,578.83
5. Step 5: Solve for x
   x = 4,030,578.83/1,665.45
6. Step 6: Final answer
   x = 2,420.12