Finding the Third Proportional to 11,137.50 and 13,189.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,137.50 : 13,189.50 = 13,189.50 : x
2. Step 2: Convert to fraction form
   11,137.50/13,189.50 = 13,189.50/x
3. Step 3: Cross multiply
   11,137.50x = 13,189.50 × 13,189.50
4. Step 4: Simplify right side
   11,137.50x = 173,962,910.25
5. Step 5: Solve for x
   x = 173,962,910.25/11,137.50
6. Step 6: Final answer
   x = 15,619.57