Finding the Third Proportional to 142,911 and 322,231.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,911 : 322,231.50 = 322,231.50 : x
2. Step 2: Convert to fraction form
   142,911/322,231.50 = 322,231.50/x
3. Step 3: Cross multiply
   142,911x = 322,231.50 × 322,231.50
4. Step 4: Simplify right side
   142,911x = 103,833,139,592.25
5. Step 5: Solve for x
   x = 103,833,139,592.25/142,911
6. Step 6: Final answer
   x = 726,558.06