Finding the Third Proportional to 1,863.21 and 4,076.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863.21 : 4,076.72 = 4,076.72 : x
2. Step 2: Convert to fraction form
   1,863.21/4,076.72 = 4,076.72/x
3. Step 3: Cross multiply
   1,863.21x = 4,076.72 × 4,076.72
4. Step 4: Simplify right side
   1,863.21x = 16,619,635.77
5. Step 5: Solve for x
   x = 16,619,635.77/1,863.21
6. Step 6: Final answer
   x = 8,919.89