Finding the Third Proportional to 31,383,688 and 67,721,644

Step by Step Solution

1. Step 1: Write the proportion equation
   31,383,688 : 67,721,644 = 67,721,644 : x
2. Step 2: Convert to fraction form
   31,383,688/67,721,644 = 67,721,644/x
3. Step 3: Cross multiply
   31,383,688x = 67,721,644 × 67,721,644
4. Step 4: Simplify right side
   31,383,688x = 4,586,221,066,062,736
5. Step 5: Solve for x
   x = 4,586,221,066,062,736/31,383,688
6. Step 6: Final answer
   x = 146,133,910.91