Finding the Third Proportional to 157,247 and 209,499

Step by Step Solution

1. Step 1: Write the proportion equation
   157,247 : 209,499 = 209,499 : x
2. Step 2: Convert to fraction form
   157,247/209,499 = 209,499/x
3. Step 3: Cross multiply
   157,247x = 209,499 × 209,499
4. Step 4: Simplify right side
   157,247x = 43,889,831,001
5. Step 5: Solve for x
   x = 43,889,831,001/157,247
6. Step 6: Final answer
   x = 279,113.95