Finding the Third Proportional to 18,796.38 and 39,142.63

Step by Step Solution

1. Step 1: Write the proportion equation
   18,796.38 : 39,142.63 = 39,142.63 : x
2. Step 2: Convert to fraction form
   18,796.38/39,142.63 = 39,142.63/x
3. Step 3: Cross multiply
   18,796.38x = 39,142.63 × 39,142.63
4. Step 4: Simplify right side
   18,796.38x = 1,532,145,091.89
5. Step 5: Solve for x
   x = 1,532,145,091.89/18,796.38
6. Step 6: Final answer
   x = 81,512.80