Finding the Third Proportional to 3,645,390 and 7,977,337

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645,390 : 7,977,337 = 7,977,337 : x
2. Step 2: Convert to fraction form
   3,645,390/7,977,337 = 7,977,337/x
3. Step 3: Cross multiply
   3,645,390x = 7,977,337 × 7,977,337
4. Step 4: Simplify right side
   3,645,390x = 63,637,905,611,569
5. Step 5: Solve for x
   x = 63,637,905,611,569/3,645,390
6. Step 6: Final answer
   x = 17,457,091.18