Finding the Third Proportional to 72,279 and 111,236.63

Step by Step Solution

1. Step 1: Write the proportion equation
   72,279 : 111,236.63 = 111,236.63 : x
2. Step 2: Convert to fraction form
   72,279/111,236.63 = 111,236.63/x
3. Step 3: Cross multiply
   72,279x = 111,236.63 × 111,236.63
4. Step 4: Simplify right side
   72,279x = 12,373,586,741.39
5. Step 5: Solve for x
   x = 12,373,586,741.39/72,279
6. Step 6: Final answer
   x = 171,192.00