Finding the Third Proportional to 31,516,178 and 67,740,436

Step by Step Solution

1. Step 1: Write the proportion equation
   31,516,178 : 67,740,436 = 67,740,436 : x
2. Step 2: Convert to fraction form
   31,516,178/67,740,436 = 67,740,436/x
3. Step 3: Cross multiply
   31,516,178x = 67,740,436 × 67,740,436
4. Step 4: Simplify right side
   31,516,178x = 4,588,766,669,470,096
5. Step 5: Solve for x
   x = 4,588,766,669,470,096/31,516,178
6. Step 6: Final answer
   x = 145,600,353.87