Finding the Third Proportional to 9,030 and 12,987

Step by Step Solution

1. Step 1: Write the proportion equation
   9,030 : 12,987 = 12,987 : x
2. Step 2: Convert to fraction form
   9,030/12,987 = 12,987/x
3. Step 3: Cross multiply
   9,030x = 12,987 × 12,987
4. Step 4: Simplify right side
   9,030x = 168,662,169
5. Step 5: Solve for x
   x = 168,662,169/9,030
6. Step 6: Final answer
   x = 18,677.98