Finding the Third Proportional to 3,964.31 and 8,634.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.31 : 8,634.94 = 8,634.94 : x
2. Step 2: Convert to fraction form
   3,964.31/8,634.94 = 8,634.94/x
3. Step 3: Cross multiply
   3,964.31x = 8,634.94 × 8,634.94
4. Step 4: Simplify right side
   3,964.31x = 74,562,145.63
5. Step 5: Solve for x
   x = 74,562,145.63/3,964.31
6. Step 6: Final answer
   x = 18,808.34