Finding the Third Proportional to 81,642 and 124,879.50

Step by Step Solution

1. Step 1: Write the proportion equation
   81,642 : 124,879.50 = 124,879.50 : x
2. Step 2: Convert to fraction form
   81,642/124,879.50 = 124,879.50/x
3. Step 3: Cross multiply
   81,642x = 124,879.50 × 124,879.50
4. Step 4: Simplify right side
   81,642x = 15,594,889,520.25
5. Step 5: Solve for x
   x = 15,594,889,520.25/81,642
6. Step 6: Final answer
   x = 191,015.53