Finding the Third Proportional to 31,788,381 and 68,658,618

Step by Step Solution

1. Step 1: Write the proportion equation
   31,788,381 : 68,658,618 = 68,658,618 : x
2. Step 2: Convert to fraction form
   31,788,381/68,658,618 = 68,658,618/x
3. Step 3: Cross multiply
   31,788,381x = 68,658,618 × 68,658,618
4. Step 4: Simplify right side
   31,788,381x = 4,714,005,825,669,924
5. Step 5: Solve for x
   x = 4,714,005,825,669,924/31,788,381
6. Step 6: Final answer
   x = 148,293,359.94