Finding the Third Proportional to 64,199,736 and 138,870,864

Step by Step Solution

1. Step 1: Write the proportion equation
   64,199,736 : 138,870,864 = 138,870,864 : x
2. Step 2: Convert to fraction form
   64,199,736/138,870,864 = 138,870,864/x
3. Step 3: Cross multiply
   64,199,736x = 138,870,864 × 138,870,864
4. Step 4: Simplify right side
   64,199,736x = 19,285,116,868,106,496
5. Step 5: Solve for x
   x = 19,285,116,868,106,496/64,199,736
6. Step 6: Final answer
   x = 300,392,463.73