Finding the Third Proportional to 20,431.50 and 42,927

Step by Step Solution

1. Step 1: Write the proportion equation
   20,431.50 : 42,927 = 42,927 : x
2. Step 2: Convert to fraction form
   20,431.50/42,927 = 42,927/x
3. Step 3: Cross multiply
   20,431.50x = 42,927 × 42,927
4. Step 4: Simplify right side
   20,431.50x = 1,842,727,329
5. Step 5: Solve for x
   x = 1,842,727,329/20,431.50
6. Step 6: Final answer
   x = 90,190.51