Finding the Third Proportional to 17,420.06 and 19,971.56

Step by Step Solution

1. Step 1: Write the proportion equation
   17,420.06 : 19,971.56 = 19,971.56 : x
2. Step 2: Convert to fraction form
   17,420.06/19,971.56 = 19,971.56/x
3. Step 3: Cross multiply
   17,420.06x = 19,971.56 × 19,971.56
4. Step 4: Simplify right side
   17,420.06x = 398,863,308.69
5. Step 5: Solve for x
   x = 398,863,308.69/17,420.06
6. Step 6: Final answer
   x = 22,896.78