Finding the Third Proportional to 303,639 and 453,784.50

Step by Step Solution

1. Step 1: Write the proportion equation
   303,639 : 453,784.50 = 453,784.50 : x
2. Step 2: Convert to fraction form
   303,639/453,784.50 = 453,784.50/x
3. Step 3: Cross multiply
   303,639x = 453,784.50 × 453,784.50
4. Step 4: Simplify right side
   303,639x = 205,920,372,440.25
5. Step 5: Solve for x
   x = 205,920,372,440.25/303,639
6. Step 6: Final answer
   x = 678,174.98