Finding the Third Proportional to 161,144 and 345,620

Step by Step Solution

1. Step 1: Write the proportion equation
   161,144 : 345,620 = 345,620 : x
2. Step 2: Convert to fraction form
   161,144/345,620 = 345,620/x
3. Step 3: Cross multiply
   161,144x = 345,620 × 345,620
4. Step 4: Simplify right side
   161,144x = 119,453,184,400
5. Step 5: Solve for x
   x = 119,453,184,400/161,144
6. Step 6: Final answer
   x = 741,282.23