Finding the Third Proportional to 13,839.61 and 20,708.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,839.61 : 20,708.16 = 20,708.16 : x
2. Step 2: Convert to fraction form
   13,839.61/20,708.16 = 20,708.16/x
3. Step 3: Cross multiply
   13,839.61x = 20,708.16 × 20,708.16
4. Step 4: Simplify right side
   13,839.61x = 428,827,735.27
5. Step 5: Solve for x
   x = 428,827,735.27/13,839.61
6. Step 6: Final answer
   x = 30,985.54