Finding the Third Proportional to 138,216 and 301,443

Step by Step Solution

1. Step 1: Write the proportion equation
   138,216 : 301,443 = 301,443 : x
2. Step 2: Convert to fraction form
   138,216/301,443 = 301,443/x
3. Step 3: Cross multiply
   138,216x = 301,443 × 301,443
4. Step 4: Simplify right side
   138,216x = 90,867,882,249
5. Step 5: Solve for x
   x = 90,867,882,249/138,216
6. Step 6: Final answer
   x = 657,433.89