Finding the Third Proportional to 158,780 and 342,488

Step by Step Solution

1. Step 1: Write the proportion equation
   158,780 : 342,488 = 342,488 : x
2. Step 2: Convert to fraction form
   158,780/342,488 = 342,488/x
3. Step 3: Cross multiply
   158,780x = 342,488 × 342,488
4. Step 4: Simplify right side
   158,780x = 117,298,030,144
5. Step 5: Solve for x
   x = 117,298,030,144/158,780
6. Step 6: Final answer
   x = 738,745.62