Finding the Third Proportional to 3,955,803 and 8,121,315

Step by Step Solution

1. Step 1: Write the proportion equation
   3,955,803 : 8,121,315 = 8,121,315 : x
2. Step 2: Convert to fraction form
   3,955,803/8,121,315 = 8,121,315/x
3. Step 3: Cross multiply
   3,955,803x = 8,121,315 × 8,121,315
4. Step 4: Simplify right side
   3,955,803x = 65,955,757,329,225
5. Step 5: Solve for x
   x = 65,955,757,329,225/3,955,803
6. Step 6: Final answer
   x = 16,673,165.30