Finding the Third Proportional to 9,150.75 and 19,979.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150.75 : 19,979.72 = 19,979.72 : x
2. Step 2: Convert to fraction form
   9,150.75/19,979.72 = 19,979.72/x
3. Step 3: Cross multiply
   9,150.75x = 19,979.72 × 19,979.72
4. Step 4: Simplify right side
   9,150.75x = 399,189,161.33
5. Step 5: Solve for x
   x = 399,189,161.33/9,150.75
6. Step 6: Final answer
   x = 43,623.66