Finding the Third Proportional to 164,279 and 356,442

Step by Step Solution

1. Step 1: Write the proportion equation
   164,279 : 356,442 = 356,442 : x
2. Step 2: Convert to fraction form
   164,279/356,442 = 356,442/x
3. Step 3: Cross multiply
   164,279x = 356,442 × 356,442
4. Step 4: Simplify right side
   164,279x = 127,050,899,364
5. Step 5: Solve for x
   x = 127,050,899,364/164,279
6. Step 6: Final answer
   x = 773,384.91