Finding the Third Proportional to 81,666 and 122,499.75

Step by Step Solution

1. Step 1: Write the proportion equation
   81,666 : 122,499.75 = 122,499.75 : x
2. Step 2: Convert to fraction form
   81,666/122,499.75 = 122,499.75/x
3. Step 3: Cross multiply
   81,666x = 122,499.75 × 122,499.75
4. Step 4: Simplify right side
   81,666x = 15,006,188,750.06
5. Step 5: Solve for x
   x = 15,006,188,750.06/81,666
6. Step 6: Final answer
   x = 183,750.75