Finding the Third Proportional to 315,349,645.50 and 674,280,315

Step by Step Solution

1. Step 1: Write the proportion equation
   315,349,645.50 : 674,280,315 = 674,280,315 : x
2. Step 2: Convert to fraction form
   315,349,645.50/674,280,315 = 674,280,315/x
3. Step 3: Cross multiply
   315,349,645.50x = 674,280,315 × 674,280,315
4. Step 4: Simplify right side
   315,349,645.50x = 454,653,943,196,499,200
5. Step 5: Solve for x
   x = 454,653,943,196,499,200/315,349,645.50
6. Step 6: Final answer
   x = 1,441,745,534.47