Finding the Third Proportional to 358,819.50 and 487,522.50

Step by Step Solution

1. Step 1: Write the proportion equation
   358,819.50 : 487,522.50 = 487,522.50 : x
2. Step 2: Convert to fraction form
   358,819.50/487,522.50 = 487,522.50/x
3. Step 3: Cross multiply
   358,819.50x = 487,522.50 × 487,522.50
4. Step 4: Simplify right side
   358,819.50x = 237,678,188,006.25
5. Step 5: Solve for x
   x = 237,678,188,006.25/358,819.50
6. Step 6: Final answer
   x = 662,389.27