Finding the Third Proportional to 149,598.56 and 320,211

Step by Step Solution

1. Step 1: Write the proportion equation
   149,598.56 : 320,211 = 320,211 : x
2. Step 2: Convert to fraction form
   149,598.56/320,211 = 320,211/x
3. Step 3: Cross multiply
   149,598.56x = 320,211 × 320,211
4. Step 4: Simplify right side
   149,598.56x = 102,535,084,521
5. Step 5: Solve for x
   x = 102,535,084,521/149,598.56
6. Step 6: Final answer
   x = 685,401.54