Finding the Third Proportional to 29,978,312 and 64,503,388

Step by Step Solution

1. Step 1: Write the proportion equation
   29,978,312 : 64,503,388 = 64,503,388 : x
2. Step 2: Convert to fraction form
   29,978,312/64,503,388 = 64,503,388/x
3. Step 3: Cross multiply
   29,978,312x = 64,503,388 × 64,503,388
4. Step 4: Simplify right side
   29,978,312x = 4,160,687,063,478,544
5. Step 5: Solve for x
   x = 4,160,687,063,478,544/29,978,312
6. Step 6: Final answer
   x = 138,789,904.63