Finding the Third Proportional to 31,399,864,740 and 63,722,398,536

Step by Step Solution

1. Step 1: Write the proportion equation
   31,399,864,740 : 63,722,398,536 = 63,722,398,536 : x
2. Step 2: Convert to fraction form
   31,399,864,740/63,722,398,536 = 63,722,398,536/x
3. Step 3: Cross multiply
   31,399,864,740x = 63,722,398,536 × 63,722,398,536
4. Step 4: Simplify right side
   31,399,864,740x = 4,060,544,075,180,815,155,200
5. Step 5: Solve for x
   x = 4,060,544,075,180,815,155,200/31,399,864,740
6. Step 6: Final answer
   x = 129,317,247,344.96