Finding the Third Proportional to 293,998.50 and 644,040

Step by Step Solution

1. Step 1: Write the proportion equation
   293,998.50 : 644,040 = 644,040 : x
2. Step 2: Convert to fraction form
   293,998.50/644,040 = 644,040/x
3. Step 3: Cross multiply
   293,998.50x = 644,040 × 644,040
4. Step 4: Simplify right side
   293,998.50x = 414,787,521,600
5. Step 5: Solve for x
   x = 414,787,521,600/293,998.50
6. Step 6: Final answer
   x = 1,410,849.11