Finding the Third Proportional to 72,161 and 107,472

Step by Step Solution

1. Step 1: Write the proportion equation
   72,161 : 107,472 = 107,472 : x
2. Step 2: Convert to fraction form
   72,161/107,472 = 107,472/x
3. Step 3: Cross multiply
   72,161x = 107,472 × 107,472
4. Step 4: Simplify right side
   72,161x = 11,550,230,784
5. Step 5: Solve for x
   x = 11,550,230,784/72,161
6. Step 6: Final answer
   x = 160,061.96