Finding the Third Proportional to 197,870 and 276,789

Step by Step Solution

1. Step 1: Write the proportion equation
   197,870 : 276,789 = 276,789 : x
2. Step 2: Convert to fraction form
   197,870/276,789 = 276,789/x
3. Step 3: Cross multiply
   197,870x = 276,789 × 276,789
4. Step 4: Simplify right side
   197,870x = 76,612,150,521
5. Step 5: Solve for x
   x = 76,612,150,521/197,870
6. Step 6: Final answer
   x = 387,184.27