Finding the Third Proportional to 142,560 and 331,486.50

Step by Step Solution

1. Step 1: Write the proportion equation
   142,560 : 331,486.50 = 331,486.50 : x
2. Step 2: Convert to fraction form
   142,560/331,486.50 = 331,486.50/x
3. Step 3: Cross multiply
   142,560x = 331,486.50 × 331,486.50
4. Step 4: Simplify right side
   142,560x = 109,883,299,682.25
5. Step 5: Solve for x
   x = 109,883,299,682.25/142,560
6. Step 6: Final answer
   x = 770,786.33