Finding the Third Proportional to 423,648 and 622,500

Step by Step Solution

1. Step 1: Write the proportion equation
   423,648 : 622,500 = 622,500 : x
2. Step 2: Convert to fraction form
   423,648/622,500 = 622,500/x
3. Step 3: Cross multiply
   423,648x = 622,500 × 622,500
4. Step 4: Simplify right side
   423,648x = 387,506,250,000
5. Step 5: Solve for x
   x = 387,506,250,000/423,648
6. Step 6: Final answer
   x = 914,689.20