Finding the Third Proportional to 138,870 and 298,773

Step by Step Solution

1. Step 1: Write the proportion equation
   138,870 : 298,773 = 298,773 : x
2. Step 2: Convert to fraction form
   138,870/298,773 = 298,773/x
3. Step 3: Cross multiply
   138,870x = 298,773 × 298,773
4. Step 4: Simplify right side
   138,870x = 89,265,305,529
5. Step 5: Solve for x
   x = 89,265,305,529/138,870
6. Step 6: Final answer
   x = 642,797.62