Finding the Third Proportional to 13,986.75 and 30,431.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,986.75 : 30,431.25 = 30,431.25 : x
2. Step 2: Convert to fraction form
   13,986.75/30,431.25 = 30,431.25/x
3. Step 3: Cross multiply
   13,986.75x = 30,431.25 × 30,431.25
4. Step 4: Simplify right side
   13,986.75x = 926,060,976.56
5. Step 5: Solve for x
   x = 926,060,976.56/13,986.75
6. Step 6: Final answer
   x = 66,209.88