Finding the Third Proportional to 87,315 and 142,728

Step by Step Solution

1. Step 1: Write the proportion equation
   87,315 : 142,728 = 142,728 : x
2. Step 2: Convert to fraction form
   87,315/142,728 = 142,728/x
3. Step 3: Cross multiply
   87,315x = 142,728 × 142,728
4. Step 4: Simplify right side
   87,315x = 20,371,281,984
5. Step 5: Solve for x
   x = 20,371,281,984/87,315
6. Step 6: Final answer
   x = 233,307.93