Finding the Third Proportional to 215,026.50 and 300,750

Step by Step Solution

1. Step 1: Write the proportion equation
   215,026.50 : 300,750 = 300,750 : x
2. Step 2: Convert to fraction form
   215,026.50/300,750 = 300,750/x
3. Step 3: Cross multiply
   215,026.50x = 300,750 × 300,750
4. Step 4: Simplify right side
   215,026.50x = 90,450,562,500
5. Step 5: Solve for x
   x = 90,450,562,500/215,026.50
6. Step 6: Final answer
   x = 420,648.44