Finding the Fourth Proportional to 1,662.40, 2,212.46 and 1,662.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.40 : 2,212.46 = 1,662.40 : x
2. Step 2: Convert to fraction form
   1,662.40/2,212.46 = 1,662.40/x
3. Step 3: Cross multiply
   1,662.40x = 2,212.46 × 1,662.40
4. Step 4: Simplify right side
   1,662.40x = 3,677,993.50
5. Step 5: Solve for x
   x = 3,677,993.50/1,662.40
6. Step 6: Final answer
   x = 2,212.46