Finding the Third Proportional to 111,188 and 172,424

Step by Step Solution

1. Step 1: Write the proportion equation
   111,188 : 172,424 = 172,424 : x
2. Step 2: Convert to fraction form
   111,188/172,424 = 172,424/x
3. Step 3: Cross multiply
   111,188x = 172,424 × 172,424
4. Step 4: Simplify right side
   111,188x = 29,730,035,776
5. Step 5: Solve for x
   x = 29,730,035,776/111,188
6. Step 6: Final answer
   x = 267,385.29