Finding the Third Proportional to 31,986 and 67,662.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,986 : 67,662.50 = 67,662.50 : x
2. Step 2: Convert to fraction form
   31,986/67,662.50 = 67,662.50/x
3. Step 3: Cross multiply
   31,986x = 67,662.50 × 67,662.50
4. Step 4: Simplify right side
   31,986x = 4,578,213,906.25
5. Step 5: Solve for x
   x = 4,578,213,906.25/31,986
6. Step 6: Final answer
   x = 143,131.80