Finding the Third Proportional to 31,563,123 and 67,920,149

Step by Step Solution

1. Step 1: Write the proportion equation
   31,563,123 : 67,920,149 = 67,920,149 : x
2. Step 2: Convert to fraction form
   31,563,123/67,920,149 = 67,920,149/x
3. Step 3: Cross multiply
   31,563,123x = 67,920,149 × 67,920,149
4. Step 4: Simplify right side
   31,563,123x = 4,613,146,640,182,201
5. Step 5: Solve for x
   x = 4,613,146,640,182,201/31,563,123
6. Step 6: Final answer
   x = 146,156,216.55