Finding the Third Proportional to 3,921.38 and 8,410.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.38 : 8,410.88 = 8,410.88 : x
2. Step 2: Convert to fraction form
   3,921.38/8,410.88 = 8,410.88/x
3. Step 3: Cross multiply
   3,921.38x = 8,410.88 × 8,410.88
4. Step 4: Simplify right side
   3,921.38x = 70,742,818.27
5. Step 5: Solve for x
   x = 70,742,818.27/3,921.38
6. Step 6: Final answer
   x = 18,040.31