Finding the Third Proportional to 89,579 and 139,815

Step by Step Solution

1. Step 1: Write the proportion equation
   89,579 : 139,815 = 139,815 : x
2. Step 2: Convert to fraction form
   89,579/139,815 = 139,815/x
3. Step 3: Cross multiply
   89,579x = 139,815 × 139,815
4. Step 4: Simplify right side
   89,579x = 19,548,234,225
5. Step 5: Solve for x
   x = 19,548,234,225/89,579
6. Step 6: Final answer
   x = 218,223.40