Finding the Third Proportional to 13,399.88 and 19,698.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,399.88 : 19,698.31 = 19,698.31 : x
2. Step 2: Convert to fraction form
   13,399.88/19,698.31 = 19,698.31/x
3. Step 3: Cross multiply
   13,399.88x = 19,698.31 × 19,698.31
4. Step 4: Simplify right side
   13,399.88x = 388,023,515.35
5. Step 5: Solve for x
   x = 388,023,515.35/13,399.88
6. Step 6: Final answer
   x = 28,957.25