Finding the Third Proportional to 72,279 and 111,237

Step by Step Solution

1. Step 1: Write the proportion equation
   72,279 : 111,237 = 111,237 : x
2. Step 2: Convert to fraction form
   72,279/111,237 = 111,237/x
3. Step 3: Cross multiply
   72,279x = 111,237 × 111,237
4. Step 4: Simplify right side
   72,279x = 12,373,670,169
5. Step 5: Solve for x
   x = 12,373,670,169/72,279
6. Step 6: Final answer
   x = 171,193.16