Finding the Third Proportional to 67,642.50 and 91,257

Step by Step Solution

1. Step 1: Write the proportion equation
   67,642.50 : 91,257 = 91,257 : x
2. Step 2: Convert to fraction form
   67,642.50/91,257 = 91,257/x
3. Step 3: Cross multiply
   67,642.50x = 91,257 × 91,257
4. Step 4: Simplify right side
   67,642.50x = 8,327,840,049
5. Step 5: Solve for x
   x = 8,327,840,049/67,642.50
6. Step 6: Final answer
   x = 123,115.50