Finding the Third Proportional to 162,870 and 353,580

Step by Step Solution

1. Step 1: Write the proportion equation
   162,870 : 353,580 = 353,580 : x
2. Step 2: Convert to fraction form
   162,870/353,580 = 353,580/x
3. Step 3: Cross multiply
   162,870x = 353,580 × 353,580
4. Step 4: Simplify right side
   162,870x = 125,018,816,400
5. Step 5: Solve for x
   x = 125,018,816,400/162,870
6. Step 6: Final answer
   x = 767,598.80