Finding the Third Proportional to 18,431.44 and 39,983.63

Step by Step Solution

1. Step 1: Write the proportion equation
   18,431.44 : 39,983.63 = 39,983.63 : x
2. Step 2: Convert to fraction form
   18,431.44/39,983.63 = 39,983.63/x
3. Step 3: Cross multiply
   18,431.44x = 39,983.63 × 39,983.63
4. Step 4: Simplify right side
   18,431.44x = 1,598,690,268.14
5. Step 5: Solve for x
   x = 1,598,690,268.14/18,431.44
6. Step 6: Final answer
   x = 86,737.15