Finding the Third Proportional to 20,110 and 42,890

Step by Step Solution

1. Step 1: Write the proportion equation
   20,110 : 42,890 = 42,890 : x
2. Step 2: Convert to fraction form
   20,110/42,890 = 42,890/x
3. Step 3: Cross multiply
   20,110x = 42,890 × 42,890
4. Step 4: Simplify right side
   20,110x = 1,839,552,100
5. Step 5: Solve for x
   x = 1,839,552,100/20,110
6. Step 6: Final answer
   x = 91,474.50