Finding the Third Proportional to 12,803 and 30,987

Step by Step Solution

1. Step 1: Write the proportion equation
   12,803 : 30,987 = 30,987 : x
2. Step 2: Convert to fraction form
   12,803/30,987 = 30,987/x
3. Step 3: Cross multiply
   12,803x = 30,987 × 30,987
4. Step 4: Simplify right side
   12,803x = 960,194,169
5. Step 5: Solve for x
   x = 960,194,169/12,803
6. Step 6: Final answer
   x = 74,997.59