Finding the Third Proportional to 20,912 and 42,844

Step by Step Solution

1. Step 1: Write the proportion equation
   20,912 : 42,844 = 42,844 : x
2. Step 2: Convert to fraction form
   20,912/42,844 = 42,844/x
3. Step 3: Cross multiply
   20,912x = 42,844 × 42,844
4. Step 4: Simplify right side
   20,912x = 1,835,608,336
5. Step 5: Solve for x
   x = 1,835,608,336/20,912
6. Step 6: Final answer
   x = 87,777.75