Finding the Third Proportional to 39,259.69 and 81,840.38

Step by Step Solution

1. Step 1: Write the proportion equation
   39,259.69 : 81,840.38 = 81,840.38 : x
2. Step 2: Convert to fraction form
   39,259.69/81,840.38 = 81,840.38/x
3. Step 3: Cross multiply
   39,259.69x = 81,840.38 × 81,840.38
4. Step 4: Simplify right side
   39,259.69x = 6,697,846,980.14
5. Step 5: Solve for x
   x = 6,697,846,980.14/39,259.69
6. Step 6: Final answer
   x = 170,603.68