Finding the Third Proportional to 288,037.50 and 387,756

Step by Step Solution

1. Step 1: Write the proportion equation
   288,037.50 : 387,756 = 387,756 : x
2. Step 2: Convert to fraction form
   288,037.50/387,756 = 387,756/x
3. Step 3: Cross multiply
   288,037.50x = 387,756 × 387,756
4. Step 4: Simplify right side
   288,037.50x = 150,354,715,536
5. Step 5: Solve for x
   x = 150,354,715,536/288,037.50
6. Step 6: Final answer
   x = 521,997.02