Finding the Third Proportional to 398,440 and 592,012

Step by Step Solution

1. Step 1: Write the proportion equation
   398,440 : 592,012 = 592,012 : x
2. Step 2: Convert to fraction form
   398,440/592,012 = 592,012/x
3. Step 3: Cross multiply
   398,440x = 592,012 × 592,012
4. Step 4: Simplify right side
   398,440x = 350,478,208,144
5. Step 5: Solve for x
   x = 350,478,208,144/398,440
6. Step 6: Final answer
   x = 879,626.06