Finding the Third Proportional to 76,640 and 111,984

Step by Step Solution

1. Step 1: Write the proportion equation
   76,640 : 111,984 = 111,984 : x
2. Step 2: Convert to fraction form
   76,640/111,984 = 111,984/x
3. Step 3: Cross multiply
   76,640x = 111,984 × 111,984
4. Step 4: Simplify right side
   76,640x = 12,540,416,256
5. Step 5: Solve for x
   x = 12,540,416,256/76,640
6. Step 6: Final answer
   x = 163,627.56