Finding the Third Proportional to 31,518,468 and 67,899,456

Step by Step Solution

1. Step 1: Write the proportion equation
   31,518,468 : 67,899,456 = 67,899,456 : x
2. Step 2: Convert to fraction form
   31,518,468/67,899,456 = 67,899,456/x
3. Step 3: Cross multiply
   31,518,468x = 67,899,456 × 67,899,456
4. Step 4: Simplify right side
   31,518,468x = 4,610,336,125,095,936
5. Step 5: Solve for x
   x = 4,610,336,125,095,936/31,518,468
6. Step 6: Final answer
   x = 146,274,118.56