Finding the Third Proportional to 142,885.50 and 310,395

Step by Step Solution

1. Step 1: Write the proportion equation
   142,885.50 : 310,395 = 310,395 : x
2. Step 2: Convert to fraction form
   142,885.50/310,395 = 310,395/x
3. Step 3: Cross multiply
   142,885.50x = 310,395 × 310,395
4. Step 4: Simplify right side
   142,885.50x = 96,345,056,025
5. Step 5: Solve for x
   x = 96,345,056,025/142,885.50
6. Step 6: Final answer
   x = 674,281.55