Finding the Third Proportional to 18,705 and 40,003.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,705 : 40,003.50 = 40,003.50 : x
2. Step 2: Convert to fraction form
   18,705/40,003.50 = 40,003.50/x
3. Step 3: Cross multiply
   18,705x = 40,003.50 × 40,003.50
4. Step 4: Simplify right side
   18,705x = 1,600,280,012.25
5. Step 5: Solve for x
   x = 1,600,280,012.25/18,705
6. Step 6: Final answer
   x = 85,553.60