Finding the Third Proportional to 29,978,056 and 64,502,864

Step by Step Solution

1. Step 1: Write the proportion equation
   29,978,056 : 64,502,864 = 64,502,864 : x
2. Step 2: Convert to fraction form
   29,978,056/64,502,864 = 64,502,864/x
3. Step 3: Cross multiply
   29,978,056x = 64,502,864 × 64,502,864
4. Step 4: Simplify right side
   29,978,056x = 4,160,619,464,202,496
5. Step 5: Solve for x
   x = 4,160,619,464,202,496/29,978,056
6. Step 6: Final answer
   x = 138,788,834.88