Finding the Third Proportional to 140,352 and 300,720

Step by Step Solution

1. Step 1: Write the proportion equation
   140,352 : 300,720 = 300,720 : x
2. Step 2: Convert to fraction form
   140,352/300,720 = 300,720/x
3. Step 3: Cross multiply
   140,352x = 300,720 × 300,720
4. Step 4: Simplify right side
   140,352x = 90,432,518,400
5. Step 5: Solve for x
   x = 90,432,518,400/140,352
6. Step 6: Final answer
   x = 644,326.54