Finding the Third Proportional to 54,018.25 and 81,772.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,018.25 : 81,772.50 = 81,772.50 : x
2. Step 2: Convert to fraction form
   54,018.25/81,772.50 = 81,772.50/x
3. Step 3: Cross multiply
   54,018.25x = 81,772.50 × 81,772.50
4. Step 4: Simplify right side
   54,018.25x = 6,686,741,756.25
5. Step 5: Solve for x
   x = 6,686,741,756.25/54,018.25
6. Step 6: Final answer
   x = 123,786.72