Finding the Third Proportional to 10,138.50 and 11,992.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,138.50 : 11,992.50 = 11,992.50 : x
2. Step 2: Convert to fraction form
   10,138.50/11,992.50 = 11,992.50/x
3. Step 3: Cross multiply
   10,138.50x = 11,992.50 × 11,992.50
4. Step 4: Simplify right side
   10,138.50x = 143,820,056.25
5. Step 5: Solve for x
   x = 143,820,056.25/10,138.50
6. Step 6: Final answer
   x = 14,185.54