Finding the Third Proportional to 138,060 and 298,692

Step by Step Solution

1. Step 1: Write the proportion equation
   138,060 : 298,692 = 298,692 : x
2. Step 2: Convert to fraction form
   138,060/298,692 = 298,692/x
3. Step 3: Cross multiply
   138,060x = 298,692 × 298,692
4. Step 4: Simplify right side
   138,060x = 89,216,910,864
5. Step 5: Solve for x
   x = 89,216,910,864/138,060
6. Step 6: Final answer
   x = 646,218.39