Finding the Third Proportional to 18,171.21 and 38,543.98

Step by Step Solution

1. Step 1: Write the proportion equation
   18,171.21 : 38,543.98 = 38,543.98 : x
2. Step 2: Convert to fraction form
   18,171.21/38,543.98 = 38,543.98/x
3. Step 3: Cross multiply
   18,171.21x = 38,543.98 × 38,543.98
4. Step 4: Simplify right side
   18,171.21x = 1,485,638,129.25
5. Step 5: Solve for x
   x = 1,485,638,129.25/18,171.21
6. Step 6: Final answer
   x = 81,757.79