Finding the Third Proportional to 1,099.50 and 2,199

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.50 : 2,199 = 2,199 : x
2. Step 2: Convert to fraction form
   1,099.50/2,199 = 2,199/x
3. Step 3: Cross multiply
   1,099.50x = 2,199 × 2,199
4. Step 4: Simplify right side
   1,099.50x = 4,835,601
5. Step 5: Solve for x
   x = 4,835,601/1,099.50
6. Step 6: Final answer
   x = 4,398