Finding the Third Proportional to 17,977,872 and 39,620,406

Step by Step Solution

1. Step 1: Write the proportion equation
   17,977,872 : 39,620,406 = 39,620,406 : x
2. Step 2: Convert to fraction form
   17,977,872/39,620,406 = 39,620,406/x
3. Step 3: Cross multiply
   17,977,872x = 39,620,406 × 39,620,406
4. Step 4: Simplify right side
   17,977,872x = 1,569,776,571,604,836
5. Step 5: Solve for x
   x = 1,569,776,571,604,836/17,977,872
6. Step 6: Final answer
   x = 87,317,151.42