Finding the Third Proportional to 20,344 and 42,875

Step by Step Solution

1. Step 1: Write the proportion equation
   20,344 : 42,875 = 42,875 : x
2. Step 2: Convert to fraction form
   20,344/42,875 = 42,875/x
3. Step 3: Cross multiply
   20,344x = 42,875 × 42,875
4. Step 4: Simplify right side
   20,344x = 1,838,265,625
5. Step 5: Solve for x
   x = 1,838,265,625/20,344
6. Step 6: Final answer
   x = 90,359.10