Finding the Third Proportional to 3,815.81 and 8,047.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,815.81 : 8,047.31 = 8,047.31 : x
2. Step 2: Convert to fraction form
   3,815.81/8,047.31 = 8,047.31/x
3. Step 3: Cross multiply
   3,815.81x = 8,047.31 × 8,047.31
4. Step 4: Simplify right side
   3,815.81x = 64,759,238.47
5. Step 5: Solve for x
   x = 64,759,238.47/3,815.81
6. Step 6: Final answer
   x = 16,971.28