Finding the Third Proportional to 122,667.75 and 252,990

Step by Step Solution

1. Step 1: Write the proportion equation
   122,667.75 : 252,990 = 252,990 : x
2. Step 2: Convert to fraction form
   122,667.75/252,990 = 252,990/x
3. Step 3: Cross multiply
   122,667.75x = 252,990 × 252,990
4. Step 4: Simplify right side
   122,667.75x = 64,003,940,100
5. Step 5: Solve for x
   x = 64,003,940,100/122,667.75
6. Step 6: Final answer
   x = 521,766.64