Finding the Third Proportional to 72,780 and 112,161

Step by Step Solution

1. Step 1: Write the proportion equation
   72,780 : 112,161 = 112,161 : x
2. Step 2: Convert to fraction form
   72,780/112,161 = 112,161/x
3. Step 3: Cross multiply
   72,780x = 112,161 × 112,161
4. Step 4: Simplify right side
   72,780x = 12,580,089,921
5. Step 5: Solve for x
   x = 12,580,089,921/72,780
6. Step 6: Final answer
   x = 172,850.92