Finding the Third Proportional to 31,286.25 and 67,918.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,286.25 : 67,918.50 = 67,918.50 : x
2. Step 2: Convert to fraction form
   31,286.25/67,918.50 = 67,918.50/x
3. Step 3: Cross multiply
   31,286.25x = 67,918.50 × 67,918.50
4. Step 4: Simplify right side
   31,286.25x = 4,612,922,642.25
5. Step 5: Solve for x
   x = 4,612,922,642.25/31,286.25
6. Step 6: Final answer
   x = 147,442.49