Finding the Third Proportional to 89,456 and 139,072

Step by Step Solution

1. Step 1: Write the proportion equation
   89,456 : 139,072 = 139,072 : x
2. Step 2: Convert to fraction form
   89,456/139,072 = 139,072/x
3. Step 3: Cross multiply
   89,456x = 139,072 × 139,072
4. Step 4: Simplify right side
   89,456x = 19,341,021,184
5. Step 5: Solve for x
   x = 19,341,021,184/89,456
6. Step 6: Final answer
   x = 216,207.09