Finding the Third Proportional to 11,143.50 and 12,907.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,143.50 : 12,907.50 = 12,907.50 : x
2. Step 2: Convert to fraction form
   11,143.50/12,907.50 = 12,907.50/x
3. Step 3: Cross multiply
   11,143.50x = 12,907.50 × 12,907.50
4. Step 4: Simplify right side
   11,143.50x = 166,603,556.25
5. Step 5: Solve for x
   x = 166,603,556.25/11,143.50
6. Step 6: Final answer
   x = 14,950.74