Finding the Third Proportional to 126,116 and 258,064

Step by Step Solution

1. Step 1: Write the proportion equation
   126,116 : 258,064 = 258,064 : x
2. Step 2: Convert to fraction form
   126,116/258,064 = 258,064/x
3. Step 3: Cross multiply
   126,116x = 258,064 × 258,064
4. Step 4: Simplify right side
   126,116x = 66,597,028,096
5. Step 5: Solve for x
   x = 66,597,028,096/126,116
6. Step 6: Final answer
   x = 528,061.69