Finding the Third Proportional to 72,270 and 111,221

Step by Step Solution

1. Step 1: Write the proportion equation
   72,270 : 111,221 = 111,221 : x
2. Step 2: Convert to fraction form
   72,270/111,221 = 111,221/x
3. Step 3: Cross multiply
   72,270x = 111,221 × 111,221
4. Step 4: Simplify right side
   72,270x = 12,370,110,841
5. Step 5: Solve for x
   x = 12,370,110,841/72,270
6. Step 6: Final answer
   x = 171,165.23