Finding the Third Proportional to 30,885,642 and 67,149,684

Step by Step Solution

1. Step 1: Write the proportion equation
   30,885,642 : 67,149,684 = 67,149,684 : x
2. Step 2: Convert to fraction form
   30,885,642/67,149,684 = 67,149,684/x
3. Step 3: Cross multiply
   30,885,642x = 67,149,684 × 67,149,684
4. Step 4: Simplify right side
   30,885,642x = 4,509,080,061,299,856
5. Step 5: Solve for x
   x = 4,509,080,061,299,856/30,885,642
6. Step 6: Final answer
   x = 145,992,758.10