Finding the Third Proportional to 31,473,142 and 67,729,258

Step by Step Solution

1. Step 1: Write the proportion equation
   31,473,142 : 67,729,258 = 67,729,258 : x
2. Step 2: Convert to fraction form
   31,473,142/67,729,258 = 67,729,258/x
3. Step 3: Cross multiply
   31,473,142x = 67,729,258 × 67,729,258
4. Step 4: Simplify right side
   31,473,142x = 4,587,252,389,230,564
5. Step 5: Solve for x
   x = 4,587,252,389,230,564/31,473,142
6. Step 6: Final answer
   x = 145,751,332.65