Finding the Third Proportional to 3,917.53 and 8,381.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,917.53 : 8,381.39 = 8,381.39 : x
2. Step 2: Convert to fraction form
   3,917.53/8,381.39 = 8,381.39/x
3. Step 3: Cross multiply
   3,917.53x = 8,381.39 × 8,381.39
4. Step 4: Simplify right side
   3,917.53x = 70,247,708.81
5. Step 5: Solve for x
   x = 70,247,708.81/3,917.53
6. Step 6: Final answer
   x = 17,931.63