Finding the Third Proportional to 9,988 and 13,560

Step by Step Solution

1. Step 1: Write the proportion equation
   9,988 : 13,560 = 13,560 : x
2. Step 2: Convert to fraction form
   9,988/13,560 = 13,560/x
3. Step 3: Cross multiply
   9,988x = 13,560 × 13,560
4. Step 4: Simplify right side
   9,988x = 183,873,600
5. Step 5: Solve for x
   x = 183,873,600/9,988
6. Step 6: Final answer
   x = 18,409.45