Finding the Third Proportional to 14,420 and 31,288

Step by Step Solution

1. Step 1: Write the proportion equation
   14,420 : 31,288 = 31,288 : x
2. Step 2: Convert to fraction form
   14,420/31,288 = 31,288/x
3. Step 3: Cross multiply
   14,420x = 31,288 × 31,288
4. Step 4: Simplify right side
   14,420x = 978,938,944
5. Step 5: Solve for x
   x = 978,938,944/14,420
6. Step 6: Final answer
   x = 67,887.58