Finding the Third Proportional to 86,297,378 and 185,401,620

Step by Step Solution

1. Step 1: Write the proportion equation
   86,297,378 : 185,401,620 = 185,401,620 : x
2. Step 2: Convert to fraction form
   86,297,378/185,401,620 = 185,401,620/x
3. Step 3: Cross multiply
   86,297,378x = 185,401,620 × 185,401,620
4. Step 4: Simplify right side
   86,297,378x = 34,373,760,698,624,400
5. Step 5: Solve for x
   x = 34,373,760,698,624,400/86,297,378
6. Step 6: Final answer
   x = 398,317,556.05