Finding the Third Proportional to 169,830 and 359,890

Step by Step Solution

1. Step 1: Write the proportion equation
   169,830 : 359,890 = 359,890 : x
2. Step 2: Convert to fraction form
   169,830/359,890 = 359,890/x
3. Step 3: Cross multiply
   169,830x = 359,890 × 359,890
4. Step 4: Simplify right side
   169,830x = 129,520,812,100
5. Step 5: Solve for x
   x = 129,520,812,100/169,830
6. Step 6: Final answer
   x = 762,649.78