Finding the Third Proportional to 54,017.50 and 81,771.63

Step by Step Solution

1. Step 1: Write the proportion equation
   54,017.50 : 81,771.63 = 81,771.63 : x
2. Step 2: Convert to fraction form
   54,017.50/81,771.63 = 81,771.63/x
3. Step 3: Cross multiply
   54,017.50x = 81,771.63 × 81,771.63
4. Step 4: Simplify right side
   54,017.50x = 6,686,598,655.14
5. Step 5: Solve for x
   x = 6,686,598,655.14/54,017.50
6. Step 6: Final answer
   x = 123,785.79