Finding the Third Proportional to 153,859.50 and 319,950

Step by Step Solution

1. Step 1: Write the proportion equation
   153,859.50 : 319,950 = 319,950 : x
2. Step 2: Convert to fraction form
   153,859.50/319,950 = 319,950/x
3. Step 3: Cross multiply
   153,859.50x = 319,950 × 319,950
4. Step 4: Simplify right side
   153,859.50x = 102,368,002,500
5. Step 5: Solve for x
   x = 102,368,002,500/153,859.50
6. Step 6: Final answer
   x = 665,334.30