Finding the Third Proportional to 11,135.25 and 13,200.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,135.25 : 13,200.75 = 13,200.75 : x
2. Step 2: Convert to fraction form
   11,135.25/13,200.75 = 13,200.75/x
3. Step 3: Cross multiply
   11,135.25x = 13,200.75 × 13,200.75
4. Step 4: Simplify right side
   11,135.25x = 174,259,800.56
5. Step 5: Solve for x
   x = 174,259,800.56/11,135.25
6. Step 6: Final answer
   x = 15,649.38