Finding the Third Proportional to 31,152,878 and 68,178,544

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152,878 : 68,178,544 = 68,178,544 : x
2. Step 2: Convert to fraction form
   31,152,878/68,178,544 = 68,178,544/x
3. Step 3: Cross multiply
   31,152,878x = 68,178,544 × 68,178,544
4. Step 4: Simplify right side
   31,152,878x = 4,648,313,861,959,936
5. Step 5: Solve for x
   x = 4,648,313,861,959,936/31,152,878
6. Step 6: Final answer
   x = 149,209,773.23