Finding the Third Proportional to 81,061.50 and 122,709

Step by Step Solution

1. Step 1: Write the proportion equation
   81,061.50 : 122,709 = 122,709 : x
2. Step 2: Convert to fraction form
   81,061.50/122,709 = 122,709/x
3. Step 3: Cross multiply
   81,061.50x = 122,709 × 122,709
4. Step 4: Simplify right side
   81,061.50x = 15,057,498,681
5. Step 5: Solve for x
   x = 15,057,498,681/81,061.50
6. Step 6: Final answer
   x = 185,754.01