Finding the Fourth Proportional to 2,669.43, 3,998.56 and 2,146.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,669.43 : 3,998.56 = 2,146.60 : x
2. Step 2: Convert to fraction form
   2,669.43/3,998.56 = 2,146.60/x
3. Step 3: Cross multiply
   2,669.43x = 3,998.56 × 2,146.60
4. Step 4: Simplify right side
   2,669.43x = 8,583,323.10
5. Step 5: Solve for x
   x = 8,583,323.10/2,669.43
6. Step 6: Final answer
   x = 3,215.42