Finding the Third Proportional to 363,179.50 and 428,790

Step by Step Solution

1. Step 1: Write the proportion equation
   363,179.50 : 428,790 = 428,790 : x
2. Step 2: Convert to fraction form
   363,179.50/428,790 = 428,790/x
3. Step 3: Cross multiply
   363,179.50x = 428,790 × 428,790
4. Step 4: Simplify right side
   363,179.50x = 183,860,864,100
5. Step 5: Solve for x
   x = 183,860,864,100/363,179.50
6. Step 6: Final answer
   x = 506,253.42