Finding the Third Proportional to 300,793.50 and 642,188.25

Step by Step Solution

1. Step 1: Write the proportion equation
   300,793.50 : 642,188.25 = 642,188.25 : x
2. Step 2: Convert to fraction form
   300,793.50/642,188.25 = 642,188.25/x
3. Step 3: Cross multiply
   300,793.50x = 642,188.25 × 642,188.25
4. Step 4: Simplify right side
   300,793.50x = 412,405,748,438.06
5. Step 5: Solve for x
   x = 412,405,748,438.06/300,793.50
6. Step 6: Final answer
   x = 1,371,059.38