Finding the Third Proportional to 1,665.50 and 3,503.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.50 : 3,503.50 = 3,503.50 : x
2. Step 2: Convert to fraction form
   1,665.50/3,503.50 = 3,503.50/x
3. Step 3: Cross multiply
   1,665.50x = 3,503.50 × 3,503.50
4. Step 4: Simplify right side
   1,665.50x = 12,274,512.25
5. Step 5: Solve for x
   x = 12,274,512.25/1,665.50
6. Step 6: Final answer
   x = 7,369.87