Finding the Third Proportional to 9,155 and 19,988

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155 : 19,988 = 19,988 : x
2. Step 2: Convert to fraction form
   9,155/19,988 = 19,988/x
3. Step 3: Cross multiply
   9,155x = 19,988 × 19,988
4. Step 4: Simplify right side
   9,155x = 399,520,144
5. Step 5: Solve for x
   x = 399,520,144/9,155
6. Step 6: Final answer
   x = 43,639.56