Finding the Third Proportional to 644,178,354,438.10 and 1,401,455,200,427.10

Step by Step Solution

1. Step 1: Write the proportion equation
   644,178,354,438.10 : 1,401,455,200,427.10 = 1,401,455,200,427.10 : x
2. Step 2: Convert to fraction form
   644,178,354,438.10/1,401,455,200,427.10 = 1,401,455,200,427.10/x
3. Step 3: Cross multiply
   644,178,354,438.10x = 1,401,455,200,427.10 × 1,401,455,200,427.10
4. Step 4: Simplify right side
   644,178,354,438.10x = 1,964,076,678,804,163,186,917,376
5. Step 5: Solve for x
   x = 1,964,076,678,804,163,186,917,376/644,178,354,438.10
6. Step 6: Final answer
   x = 3,048,964,103,299.27