Finding the Third Proportional to 86,290,388 and 185,387,849

Step by Step Solution

1. Step 1: Write the proportion equation
   86,290,388 : 185,387,849 = 185,387,849 : x
2. Step 2: Convert to fraction form
   86,290,388/185,387,849 = 185,387,849/x
3. Step 3: Cross multiply
   86,290,388x = 185,387,849 × 185,387,849
4. Step 4: Simplify right side
   86,290,388x = 34,368,654,556,846,800
5. Step 5: Solve for x
   x = 34,368,654,556,846,800/86,290,388
6. Step 6: Final answer
   x = 398,290,648.05