Finding the Third Proportional to 423,357 and 603,505.50

Step by Step Solution

1. Step 1: Write the proportion equation
   423,357 : 603,505.50 = 603,505.50 : x
2. Step 2: Convert to fraction form
   423,357/603,505.50 = 603,505.50/x
3. Step 3: Cross multiply
   423,357x = 603,505.50 × 603,505.50
4. Step 4: Simplify right side
   423,357x = 364,218,888,530.25
5. Step 5: Solve for x
   x = 364,218,888,530.25/423,357
6. Step 6: Final answer
   x = 860,311.48