Finding the Third Proportional to 603,591 and 905,458.50

Step by Step Solution

1. Step 1: Write the proportion equation
   603,591 : 905,458.50 = 905,458.50 : x
2. Step 2: Convert to fraction form
   603,591/905,458.50 = 905,458.50/x
3. Step 3: Cross multiply
   603,591x = 905,458.50 × 905,458.50
4. Step 4: Simplify right side
   603,591x = 819,855,095,222.25
5. Step 5: Solve for x
   x = 819,855,095,222.25/603,591
6. Step 6: Final answer
   x = 1,358,295.76