Finding the Third Proportional to 31,139,503,884 and 64,486,536,408

Step by Step Solution

1. Step 1: Write the proportion equation
   31,139,503,884 : 64,486,536,408 = 64,486,536,408 : x
2. Step 2: Convert to fraction form
   31,139,503,884/64,486,536,408 = 64,486,536,408/x
3. Step 3: Cross multiply
   31,139,503,884x = 64,486,536,408 × 64,486,536,408
4. Step 4: Simplify right side
   31,139,503,884x = 4,158,513,377,900,309,774,336
5. Step 5: Solve for x
   x = 4,158,513,377,900,309,774,336/31,139,503,884
6. Step 6: Final answer
   x = 133,544,625,289.84