Finding the Third Proportional to 138,458 and 300,244

Step by Step Solution

1. Step 1: Write the proportion equation
   138,458 : 300,244 = 300,244 : x
2. Step 2: Convert to fraction form
   138,458/300,244 = 300,244/x
3. Step 3: Cross multiply
   138,458x = 300,244 × 300,244
4. Step 4: Simplify right side
   138,458x = 90,146,459,536
5. Step 5: Solve for x
   x = 90,146,459,536/138,458
6. Step 6: Final answer
   x = 651,074.40