Finding the Third Proportional to 158,508 and 330,111

Step by Step Solution

1. Step 1: Write the proportion equation
   158,508 : 330,111 = 330,111 : x
2. Step 2: Convert to fraction form
   158,508/330,111 = 330,111/x
3. Step 3: Cross multiply
   158,508x = 330,111 × 330,111
4. Step 4: Simplify right side
   158,508x = 108,973,272,321
5. Step 5: Solve for x
   x = 108,973,272,321/158,508
6. Step 6: Final answer
   x = 687,493.83