Finding the Third Proportional to 11,199 and 17,122.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,199 : 17,122.50 = 17,122.50 : x
2. Step 2: Convert to fraction form
   11,199/17,122.50 = 17,122.50/x
3. Step 3: Cross multiply
   11,199x = 17,122.50 × 17,122.50
4. Step 4: Simplify right side
   11,199x = 293,180,006.25
5. Step 5: Solve for x
   x = 293,180,006.25/11,199
6. Step 6: Final answer
   x = 26,179.12