Finding the Third Proportional to 315,309 and 453,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,309 : 453,280.50 = 453,280.50 : x
2. Step 2: Convert to fraction form
   315,309/453,280.50 = 453,280.50/x
3. Step 3: Cross multiply
   315,309x = 453,280.50 × 453,280.50
4. Step 4: Simplify right side
   315,309x = 205,463,211,680.25
5. Step 5: Solve for x
   x = 205,463,211,680.25/315,309
6. Step 6: Final answer
   x = 651,624.95