Finding the Third Proportional to 303,715 and 453,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   303,715 : 453,109.50 = 453,109.50 : x
2. Step 2: Convert to fraction form
   303,715/453,109.50 = 453,109.50/x
3. Step 3: Cross multiply
   303,715x = 453,109.50 × 453,109.50
4. Step 4: Simplify right side
   303,715x = 205,308,218,990.25
5. Step 5: Solve for x
   x = 205,308,218,990.25/303,715
6. Step 6: Final answer
   x = 675,989.72