Finding the Third Proportional to 10,619.86 and 16,387.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,619.86 : 16,387.31 = 16,387.31 : x
2. Step 2: Convert to fraction form
   10,619.86/16,387.31 = 16,387.31/x
3. Step 3: Cross multiply
   10,619.86x = 16,387.31 × 16,387.31
4. Step 4: Simplify right side
   10,619.86x = 268,544,010.97
5. Step 5: Solve for x
   x = 268,544,010.97/10,619.86
6. Step 6: Final answer
   x = 25,286.96