Finding the Third Proportional to 29,978,322 and 64,503,408

Step by Step Solution

1. Step 1: Write the proportion equation
   29,978,322 : 64,503,408 = 64,503,408 : x
2. Step 2: Convert to fraction form
   29,978,322/64,503,408 = 64,503,408/x
3. Step 3: Cross multiply
   29,978,322x = 64,503,408 × 64,503,408
4. Step 4: Simplify right side
   29,978,322x = 4,160,689,643,614,464
5. Step 5: Solve for x
   x = 4,160,689,643,614,464/29,978,322
6. Step 6: Final answer
   x = 138,789,944.40