Finding the Third Proportional to 81,120 and 108,510

Step by Step Solution

1. Step 1: Write the proportion equation
   81,120 : 108,510 = 108,510 : x
2. Step 2: Convert to fraction form
   81,120/108,510 = 108,510/x
3. Step 3: Cross multiply
   81,120x = 108,510 × 108,510
4. Step 4: Simplify right side
   81,120x = 11,774,420,100
5. Step 5: Solve for x
   x = 11,774,420,100/81,120
6. Step 6: Final answer
   x = 145,148.18