Finding the Third Proportional to 86,902,564 and 188,751,908

Step by Step Solution

1. Step 1: Write the proportion equation
   86,902,564 : 188,751,908 = 188,751,908 : x
2. Step 2: Convert to fraction form
   86,902,564/188,751,908 = 188,751,908/x
3. Step 3: Cross multiply
   86,902,564x = 188,751,908 × 188,751,908
4. Step 4: Simplify right side
   86,902,564x = 35,627,282,773,640,464
5. Step 5: Solve for x
   x = 35,627,282,773,640,464/86,902,564
6. Step 6: Final answer
   x = 409,968,142.87