Finding the Third Proportional to 7,122.50 and 11,057.25

Step by Step Solution

1. Step 1: Write the proportion equation
   7,122.50 : 11,057.25 = 11,057.25 : x
2. Step 2: Convert to fraction form
   7,122.50/11,057.25 = 11,057.25/x
3. Step 3: Cross multiply
   7,122.50x = 11,057.25 × 11,057.25
4. Step 4: Simplify right side
   7,122.50x = 122,262,777.56
5. Step 5: Solve for x
   x = 122,262,777.56/7,122.50
6. Step 6: Final answer
   x = 17,165.71