Finding the Third Proportional to 392,259 and 606,140

Step by Step Solution

1. Step 1: Write the proportion equation
   392,259 : 606,140 = 606,140 : x
2. Step 2: Convert to fraction form
   392,259/606,140 = 606,140/x
3. Step 3: Cross multiply
   392,259x = 606,140 × 606,140
4. Step 4: Simplify right side
   392,259x = 367,405,699,600
5. Step 5: Solve for x
   x = 367,405,699,600/392,259
6. Step 6: Final answer
   x = 936,640.59