Finding the Third Proportional to 31,519.13 and 67,209.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,519.13 : 67,209.75 = 67,209.75 : x
2. Step 2: Convert to fraction form
   31,519.13/67,209.75 = 67,209.75/x
3. Step 3: Cross multiply
   31,519.13x = 67,209.75 × 67,209.75
4. Step 4: Simplify right side
   31,519.13x = 4,517,150,495.06
5. Step 5: Solve for x
   x = 4,517,150,495.06/31,519.13
6. Step 6: Final answer
   x = 143,314.59