Finding the Third Proportional to 111,260 and 172,510

Step by Step Solution

1. Step 1: Write the proportion equation
   111,260 : 172,510 = 172,510 : x
2. Step 2: Convert to fraction form
   111,260/172,510 = 172,510/x
3. Step 3: Cross multiply
   111,260x = 172,510 × 172,510
4. Step 4: Simplify right side
   111,260x = 29,759,700,100
5. Step 5: Solve for x
   x = 29,759,700,100/111,260
6. Step 6: Final answer
   x = 267,478.88