Finding the Third Proportional to 31,788,402 and 68,658,663

Step by Step Solution

1. Step 1: Write the proportion equation
   31,788,402 : 68,658,663 = 68,658,663 : x
2. Step 2: Convert to fraction form
   31,788,402/68,658,663 = 68,658,663/x
3. Step 3: Cross multiply
   31,788,402x = 68,658,663 × 68,658,663
4. Step 4: Simplify right side
   31,788,402x = 4,714,012,004,947,569
5. Step 5: Solve for x
   x = 4,714,012,004,947,569/31,788,402
6. Step 6: Final answer
   x = 148,293,456.37