Finding the Third Proportional to 20,460.75 and 42,987

Step by Step Solution

1. Step 1: Write the proportion equation
   20,460.75 : 42,987 = 42,987 : x
2. Step 2: Convert to fraction form
   20,460.75/42,987 = 42,987/x
3. Step 3: Cross multiply
   20,460.75x = 42,987 × 42,987
4. Step 4: Simplify right side
   20,460.75x = 1,847,882,169
5. Step 5: Solve for x
   x = 1,847,882,169/20,460.75
6. Step 6: Final answer
   x = 90,313.51