Finding the Third Proportional to 19,881 and 42,987

Step by Step Solution

1. Step 1: Write the proportion equation
   19,881 : 42,987 = 42,987 : x
2. Step 2: Convert to fraction form
   19,881/42,987 = 42,987/x
3. Step 3: Cross multiply
   19,881x = 42,987 × 42,987
4. Step 4: Simplify right side
   19,881x = 1,847,882,169
5. Step 5: Solve for x
   x = 1,847,882,169/19,881
6. Step 6: Final answer
   x = 92,947.14