Finding the Third Proportional to 138,056 and 298,684

Step by Step Solution

1. Step 1: Write the proportion equation
   138,056 : 298,684 = 298,684 : x
2. Step 2: Convert to fraction form
   138,056/298,684 = 298,684/x
3. Step 3: Cross multiply
   138,056x = 298,684 × 298,684
4. Step 4: Simplify right side
   138,056x = 89,212,131,856
5. Step 5: Solve for x
   x = 89,212,131,856/138,056
6. Step 6: Final answer
   x = 646,202.50