Finding the Third Proportional to 52,879.50 and 81,920.25

Step by Step Solution

1. Step 1: Write the proportion equation
   52,879.50 : 81,920.25 = 81,920.25 : x
2. Step 2: Convert to fraction form
   52,879.50/81,920.25 = 81,920.25/x
3. Step 3: Cross multiply
   52,879.50x = 81,920.25 × 81,920.25
4. Step 4: Simplify right side
   52,879.50x = 6,710,927,360.06
5. Step 5: Solve for x
   x = 6,710,927,360.06/52,879.50
6. Step 6: Final answer
   x = 126,909.81