Finding the Third Proportional to 10,380 and 14,920.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,380 : 14,920.50 = 14,920.50 : x
2. Step 2: Convert to fraction form
   10,380/14,920.50 = 14,920.50/x
3. Step 3: Cross multiply
   10,380x = 14,920.50 × 14,920.50
4. Step 4: Simplify right side
   10,380x = 222,621,320.25
5. Step 5: Solve for x
   x = 222,621,320.25/10,380
6. Step 6: Final answer
   x = 21,447.14