Finding the Third Proportional to 31,530.50 and 67,708

Step by Step Solution

1. Step 1: Write the proportion equation
   31,530.50 : 67,708 = 67,708 : x
2. Step 2: Convert to fraction form
   31,530.50/67,708 = 67,708/x
3. Step 3: Cross multiply
   31,530.50x = 67,708 × 67,708
4. Step 4: Simplify right side
   31,530.50x = 4,584,373,264
5. Step 5: Solve for x
   x = 4,584,373,264/31,530.50
6. Step 6: Final answer
   x = 145,394.88