Finding the Third Proportional to 11,945.94 and 18,978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,945.94 : 18,978.25 = 18,978.25 : x
2. Step 2: Convert to fraction form
   11,945.94/18,978.25 = 18,978.25/x
3. Step 3: Cross multiply
   11,945.94x = 18,978.25 × 18,978.25
4. Step 4: Simplify right side
   11,945.94x = 360,173,973.06
5. Step 5: Solve for x
   x = 360,173,973.06/11,945.94
6. Step 6: Final answer
   x = 30,150.33