Finding the Fourth Proportional to 1,665.46, 2,297.92 and 1,222.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.46 : 2,297.92 = 1,222.58 : x
2. Step 2: Convert to fraction form
   1,665.46/2,297.92 = 1,222.58/x
3. Step 3: Cross multiply
   1,665.46x = 2,297.92 × 1,222.58
4. Step 4: Simplify right side
   1,665.46x = 2,809,391.03
5. Step 5: Solve for x
   x = 2,809,391.03/1,665.46
6. Step 6: Final answer
   x = 1,686.86