Finding the Third Proportional to 12,987 and 28,188

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987 : 28,188 = 28,188 : x
2. Step 2: Convert to fraction form
   12,987/28,188 = 28,188/x
3. Step 3: Cross multiply
   12,987x = 28,188 × 28,188
4. Step 4: Simplify right side
   12,987x = 794,563,344
5. Step 5: Solve for x
   x = 794,563,344/12,987
6. Step 6: Final answer
   x = 61,181.44