Finding the Third Proportional to 647,780 and 1,423,096

Step by Step Solution

1. Step 1: Write the proportion equation
   647,780 : 1,423,096 = 1,423,096 : x
2. Step 2: Convert to fraction form
   647,780/1,423,096 = 1,423,096/x
3. Step 3: Cross multiply
   647,780x = 1,423,096 × 1,423,096
4. Step 4: Simplify right side
   647,780x = 2,025,202,225,216
5. Step 5: Solve for x
   x = 2,025,202,225,216/647,780
6. Step 6: Final answer
   x = 3,126,373.50