Finding the Third Proportional to 31,139,503,886 and 64,486,536,412

Step by Step Solution

1. Step 1: Write the proportion equation
   31,139,503,886 : 64,486,536,412 = 64,486,536,412 : x
2. Step 2: Convert to fraction form
   31,139,503,886/64,486,536,412 = 64,486,536,412/x
3. Step 3: Cross multiply
   31,139,503,886x = 64,486,536,412 × 64,486,536,412
4. Step 4: Simplify right side
   31,139,503,886x = 4,158,513,378,416,201,826,304
5. Step 5: Solve for x
   x = 4,158,513,378,416,201,826,304/31,139,503,886
6. Step 6: Final answer
   x = 133,544,625,297.83