Finding the Third Proportional to 3,645,378 and 7,977,312

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645,378 : 7,977,312 = 7,977,312 : x
2. Step 2: Convert to fraction form
   3,645,378/7,977,312 = 7,977,312/x
3. Step 3: Cross multiply
   3,645,378x = 7,977,312 × 7,977,312
4. Step 4: Simplify right side
   3,645,378x = 63,637,506,745,344
5. Step 5: Solve for x
   x = 63,637,506,745,344/3,645,378
6. Step 6: Final answer
   x = 17,457,039.23