Finding the Third Proportional to 300,730.50 and 648,472.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,730.50 : 648,472.50 = 648,472.50 : x
2. Step 2: Convert to fraction form
   300,730.50/648,472.50 = 648,472.50/x
3. Step 3: Cross multiply
   300,730.50x = 648,472.50 × 648,472.50
4. Step 4: Simplify right side
   300,730.50x = 420,516,583,256.25
5. Step 5: Solve for x
   x = 420,516,583,256.25/300,730.50
6. Step 6: Final answer
   x = 1,398,317.04