Finding the Third Proportional to 31,473,138 and 67,729,250

Step by Step Solution

1. Step 1: Write the proportion equation
   31,473,138 : 67,729,250 = 67,729,250 : x
2. Step 2: Convert to fraction form
   31,473,138/67,729,250 = 67,729,250/x
3. Step 3: Cross multiply
   31,473,138x = 67,729,250 × 67,729,250
4. Step 4: Simplify right side
   31,473,138x = 4,587,251,305,562,500
5. Step 5: Solve for x
   x = 4,587,251,305,562,500/31,473,138
6. Step 6: Final answer
   x = 145,751,316.74