Finding the Third Proportional to 603,612 and 905,491.50

Step by Step Solution

1. Step 1: Write the proportion equation
   603,612 : 905,491.50 = 905,491.50 : x
2. Step 2: Convert to fraction form
   603,612/905,491.50 = 905,491.50/x
3. Step 3: Cross multiply
   603,612x = 905,491.50 × 905,491.50
4. Step 4: Simplify right side
   603,612x = 819,914,856,572.25
5. Step 5: Solve for x
   x = 819,914,856,572.25/603,612
6. Step 6: Final answer
   x = 1,358,347.51