Finding the Third Proportional to 231,608 and 488,120

Step by Step Solution

1. Step 1: Write the proportion equation
   231,608 : 488,120 = 488,120 : x
2. Step 2: Convert to fraction form
   231,608/488,120 = 488,120/x
3. Step 3: Cross multiply
   231,608x = 488,120 × 488,120
4. Step 4: Simplify right side
   231,608x = 238,261,134,400
5. Step 5: Solve for x
   x = 238,261,134,400/231,608
6. Step 6: Final answer
   x = 1,028,725.84