Finding the Third Proportional to 42,809.50 and 68,365.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,809.50 : 68,365.50 = 68,365.50 : x
2. Step 2: Convert to fraction form
   42,809.50/68,365.50 = 68,365.50/x
3. Step 3: Cross multiply
   42,809.50x = 68,365.50 × 68,365.50
4. Step 4: Simplify right side
   42,809.50x = 4,673,841,590.25
5. Step 5: Solve for x
   x = 4,673,841,590.25/42,809.50
6. Step 6: Final answer
   x = 109,177.67