Finding the Third Proportional to 31,563,138 and 67,920,180

Step by Step Solution

1. Step 1: Write the proportion equation
   31,563,138 : 67,920,180 = 67,920,180 : x
2. Step 2: Convert to fraction form
   31,563,138/67,920,180 = 67,920,180/x
3. Step 3: Cross multiply
   31,563,138x = 67,920,180 × 67,920,180
4. Step 4: Simplify right side
   31,563,138x = 4,613,150,851,232,400
5. Step 5: Solve for x
   x = 4,613,150,851,232,400/31,563,138
6. Step 6: Final answer
   x = 146,156,280.51