Finding the Third Proportional to 263,638 and 622,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   263,638 : 622,091.50 = 622,091.50 : x
2. Step 2: Convert to fraction form
   263,638/622,091.50 = 622,091.50/x
3. Step 3: Cross multiply
   263,638x = 622,091.50 × 622,091.50
4. Step 4: Simplify right side
   263,638x = 386,997,834,372.25
5. Step 5: Solve for x
   x = 386,997,834,372.25/263,638
6. Step 6: Final answer
   x = 1,467,913.71