Finding the Third Proportional to 18,128.81 and 27,109.69

Step by Step Solution

1. Step 1: Write the proportion equation
   18,128.81 : 27,109.69 = 27,109.69 : x
2. Step 2: Convert to fraction form
   18,128.81/27,109.69 = 27,109.69/x
3. Step 3: Cross multiply
   18,128.81x = 27,109.69 × 27,109.69
4. Step 4: Simplify right side
   18,128.81x = 734,935,156.35
5. Step 5: Solve for x
   x = 734,935,156.35/18,128.81
6. Step 6: Final answer
   x = 40,539.62