Finding the Third Proportional to 89,722 and 139,317

Step by Step Solution

1. Step 1: Write the proportion equation
   89,722 : 139,317 = 139,317 : x
2. Step 2: Convert to fraction form
   89,722/139,317 = 139,317/x
3. Step 3: Cross multiply
   89,722x = 139,317 × 139,317
4. Step 4: Simplify right side
   89,722x = 19,409,226,489
5. Step 5: Solve for x
   x = 19,409,226,489/89,722
6. Step 6: Final answer
   x = 216,326.28