Finding the Third Proportional to 18,130.79 and 27,717.31

Step by Step Solution

1. Step 1: Write the proportion equation
   18,130.79 : 27,717.31 = 27,717.31 : x
2. Step 2: Convert to fraction form
   18,130.79/27,717.31 = 27,717.31/x
3. Step 3: Cross multiply
   18,130.79x = 27,717.31 × 27,717.31
4. Step 4: Simplify right side
   18,130.79x = 768,249,060.34
5. Step 5: Solve for x
   x = 768,249,060.34/18,130.79
6. Step 6: Final answer
   x = 42,372.62