Finding the Third Proportional to 647,444 and 1,423,360

Step by Step Solution

1. Step 1: Write the proportion equation
   647,444 : 1,423,360 = 1,423,360 : x
2. Step 2: Convert to fraction form
   647,444/1,423,360 = 1,423,360/x
3. Step 3: Cross multiply
   647,444x = 1,423,360 × 1,423,360
4. Step 4: Simplify right side
   647,444x = 2,025,953,689,600
5. Step 5: Solve for x
   x = 2,025,953,689,600/647,444
6. Step 6: Final answer
   x = 3,129,156.64