Finding the Third Proportional to 72,155 and 105,439

Step by Step Solution

1. Step 1: Write the proportion equation
   72,155 : 105,439 = 105,439 : x
2. Step 2: Convert to fraction form
   72,155/105,439 = 105,439/x
3. Step 3: Cross multiply
   72,155x = 105,439 × 105,439
4. Step 4: Simplify right side
   72,155x = 11,117,382,721
5. Step 5: Solve for x
   x = 11,117,382,721/72,155
6. Step 6: Final answer
   x = 154,076.40