Finding the Third Proportional to 31,152,876 and 68,178,540

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152,876 : 68,178,540 = 68,178,540 : x
2. Step 2: Convert to fraction form
   31,152,876/68,178,540 = 68,178,540/x
3. Step 3: Cross multiply
   31,152,876x = 68,178,540 × 68,178,540
4. Step 4: Simplify right side
   31,152,876x = 4,648,313,316,531,600
5. Step 5: Solve for x
   x = 4,648,313,316,531,600/31,152,876
6. Step 6: Final answer
   x = 149,209,765.30