Finding the Third Proportional to 31,777.50 and 68,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,777.50 : 68,479.50 = 68,479.50 : x
2. Step 2: Convert to fraction form
   31,777.50/68,479.50 = 68,479.50/x
3. Step 3: Cross multiply
   31,777.50x = 68,479.50 × 68,479.50
4. Step 4: Simplify right side
   31,777.50x = 4,689,441,920.25
5. Step 5: Solve for x
   x = 4,689,441,920.25/31,777.50
6. Step 6: Final answer
   x = 147,571.14