Finding the Third Proportional to 11,147 and 14,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,147 : 14,920.50 = 14,920.50 : x
2. Step 2: Convert to fraction form
   11,147/14,920.50 = 14,920.50/x
3. Step 3: Cross multiply
   11,147x = 14,920.50 × 14,920.50
4. Step 4: Simplify right side
   11,147x = 222,621,320.25
5. Step 5: Solve for x
   x = 222,621,320.25/11,147
6. Step 6: Final answer
   x = 19,971.41