Finding the Third Proportional to 31,143,975.75 and 68,150,341.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,143,975.75 : 68,150,341.69 = 68,150,341.69 : x
2. Step 2: Convert to fraction form
   31,143,975.75/68,150,341.69 = 68,150,341.69/x
3. Step 3: Cross multiply
   31,143,975.75x = 68,150,341.69 × 68,150,341.69
4. Step 4: Simplify right side
   31,143,975.75x = 4,644,469,072,123,000
5. Step 5: Solve for x
   x = 4,644,469,072,123,000/31,143,975.75
6. Step 6: Final answer
   x = 149,128,971.50