Finding the Third Proportional to 303,128 and 452,820

Step by Step Solution

1. Step 1: Write the proportion equation
   303,128 : 452,820 = 452,820 : x
2. Step 2: Convert to fraction form
   303,128/452,820 = 452,820/x
3. Step 3: Cross multiply
   303,128x = 452,820 × 452,820
4. Step 4: Simplify right side
   303,128x = 205,045,952,400
5. Step 5: Solve for x
   x = 205,045,952,400/303,128
6. Step 6: Final answer
   x = 676,433.56