Finding the Third Proportional to 11,221.50 and 12,427.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,221.50 : 12,427.50 = 12,427.50 : x
2. Step 2: Convert to fraction form
   11,221.50/12,427.50 = 12,427.50/x
3. Step 3: Cross multiply
   11,221.50x = 12,427.50 × 12,427.50
4. Step 4: Simplify right side
   11,221.50x = 154,442,756.25
5. Step 5: Solve for x
   x = 154,442,756.25/11,221.50
6. Step 6: Final answer
   x = 13,763.11