Finding the Third Proportional to 263,910 and 622,366.50

Step by Step Solution

1. Step 1: Write the proportion equation
   263,910 : 622,366.50 = 622,366.50 : x
2. Step 2: Convert to fraction form
   263,910/622,366.50 = 622,366.50/x
3. Step 3: Cross multiply
   263,910x = 622,366.50 × 622,366.50
4. Step 4: Simplify right side
   263,910x = 387,340,060,322.25
5. Step 5: Solve for x
   x = 387,340,060,322.25/263,910
6. Step 6: Final answer
   x = 1,467,697.55