Finding the Third Proportional to 1,818.75 and 3,961.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818.75 : 3,961.31 = 3,961.31 : x
2. Step 2: Convert to fraction form
   1,818.75/3,961.31 = 3,961.31/x
3. Step 3: Cross multiply
   1,818.75x = 3,961.31 × 3,961.31
4. Step 4: Simplify right side
   1,818.75x = 15,691,996.72
5. Step 5: Solve for x
   x = 15,691,996.72/1,818.75
6. Step 6: Final answer
   x = 8,627.90