Finding the Third Proportional to 644,215 and 1,455,462.50

Step by Step Solution

1. Step 1: Write the proportion equation
   644,215 : 1,455,462.50 = 1,455,462.50 : x
2. Step 2: Convert to fraction form
   644,215/1,455,462.50 = 1,455,462.50/x
3. Step 3: Cross multiply
   644,215x = 1,455,462.50 × 1,455,462.50
4. Step 4: Simplify right side
   644,215x = 2,118,371,088,906.25
5. Step 5: Solve for x
   x = 2,118,371,088,906.25/644,215
6. Step 6: Final answer
   x = 3,288,298.30