Finding the Third Proportional to 429,078.50 and 636,287

Step by Step Solution

1. Step 1: Write the proportion equation
   429,078.50 : 636,287 = 636,287 : x
2. Step 2: Convert to fraction form
   429,078.50/636,287 = 636,287/x
3. Step 3: Cross multiply
   429,078.50x = 636,287 × 636,287
4. Step 4: Simplify right side
   429,078.50x = 404,861,146,369
5. Step 5: Solve for x
   x = 404,861,146,369/429,078.50
6. Step 6: Final answer
   x = 943,559.62