Finding the Third Proportional to 158,990 and 336,928

Step by Step Solution

1. Step 1: Write the proportion equation
   158,990 : 336,928 = 336,928 : x
2. Step 2: Convert to fraction form
   158,990/336,928 = 336,928/x
3. Step 3: Cross multiply
   158,990x = 336,928 × 336,928
4. Step 4: Simplify right side
   158,990x = 113,520,477,184
5. Step 5: Solve for x
   x = 113,520,477,184/158,990
6. Step 6: Final answer
   x = 714,010.17