Finding the Third Proportional to 398,470 and 599,208

Step by Step Solution

1. Step 1: Write the proportion equation
   398,470 : 599,208 = 599,208 : x
2. Step 2: Convert to fraction form
   398,470/599,208 = 599,208/x
3. Step 3: Cross multiply
   398,470x = 599,208 × 599,208
4. Step 4: Simplify right side
   398,470x = 359,050,227,264
5. Step 5: Solve for x
   x = 359,050,227,264/398,470
6. Step 6: Final answer
   x = 901,072.17