Finding the Third Proportional to 308,088 and 661,707

Step by Step Solution

1. Step 1: Write the proportion equation
   308,088 : 661,707 = 661,707 : x
2. Step 2: Convert to fraction form
   308,088/661,707 = 661,707/x
3. Step 3: Cross multiply
   308,088x = 661,707 × 661,707
4. Step 4: Simplify right side
   308,088x = 437,856,153,849
5. Step 5: Solve for x
   x = 437,856,153,849/308,088
6. Step 6: Final answer
   x = 1,421,204.83