Finding the Third Proportional to 72,219 and 111,606

Step by Step Solution

1. Step 1: Write the proportion equation
   72,219 : 111,606 = 111,606 : x
2. Step 2: Convert to fraction form
   72,219/111,606 = 111,606/x
3. Step 3: Cross multiply
   72,219x = 111,606 × 111,606
4. Step 4: Simplify right side
   72,219x = 12,455,899,236
5. Step 5: Solve for x
   x = 12,455,899,236/72,219
6. Step 6: Final answer
   x = 172,473.99