Finding the Third Proportional to 111,374 and 172,719

Step by Step Solution

1. Step 1: Write the proportion equation
   111,374 : 172,719 = 172,719 : x
2. Step 2: Convert to fraction form
   111,374/172,719 = 172,719/x
3. Step 3: Cross multiply
   111,374x = 172,719 × 172,719
4. Step 4: Simplify right side
   111,374x = 29,831,852,961
5. Step 5: Solve for x
   x = 29,831,852,961/111,374
6. Step 6: Final answer
   x = 267,852.94