Finding the Third Proportional to 644,178,354,474 and 1,401,455,200,499.20

Step by Step Solution

1. Step 1: Write the proportion equation
   644,178,354,474 : 1,401,455,200,499.20 = 1,401,455,200,499.20 : x
2. Step 2: Convert to fraction form
   644,178,354,474/1,401,455,200,499.20 = 1,401,455,200,499.20/x
3. Step 3: Cross multiply
   644,178,354,474x = 1,401,455,200,499.20 × 1,401,455,200,499.20
4. Step 4: Simplify right side
   644,178,354,474x = 1,964,076,679,006,252,672,483,328
5. Step 5: Solve for x
   x = 1,964,076,679,006,252,672,483,328/644,178,354,474
6. Step 6: Final answer
   x = 3,048,964,103,443.07