Finding the Third Proportional to 67,640 and 105,145

Step by Step Solution

1. Step 1: Write the proportion equation
   67,640 : 105,145 = 105,145 : x
2. Step 2: Convert to fraction form
   67,640/105,145 = 105,145/x
3. Step 3: Cross multiply
   67,640x = 105,145 × 105,145
4. Step 4: Simplify right side
   67,640x = 11,055,471,025
5. Step 5: Solve for x
   x = 11,055,471,025/67,640
6. Step 6: Final answer
   x = 163,445.76