Finding the Third Proportional to 64,736,170 and 138,706,123

Step by Step Solution

1. Step 1: Write the proportion equation
   64,736,170 : 138,706,123 = 138,706,123 : x
2. Step 2: Convert to fraction form
   64,736,170/138,706,123 = 138,706,123/x
3. Step 3: Cross multiply
   64,736,170x = 138,706,123 × 138,706,123
4. Step 4: Simplify right side
   64,736,170x = 19,239,388,557,691,128
5. Step 5: Solve for x
   x = 19,239,388,557,691,128/64,736,170
6. Step 6: Final answer
   x = 297,196,892.52