Finding the Third Proportional to 644,731.50 and 1,384,607.25

Step by Step Solution

1. Step 1: Write the proportion equation
   644,731.50 : 1,384,607.25 = 1,384,607.25 : x
2. Step 2: Convert to fraction form
   644,731.50/1,384,607.25 = 1,384,607.25/x
3. Step 3: Cross multiply
   644,731.50x = 1,384,607.25 × 1,384,607.25
4. Step 4: Simplify right side
   644,731.50x = 1,917,137,236,752.56
5. Step 5: Solve for x
   x = 1,917,137,236,752.56/644,731.50
6. Step 6: Final answer
   x = 2,973,543.62