Finding the Third Proportional to 4,639.78 and 9,046.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,639.78 : 9,046.69 = 9,046.69 : x
2. Step 2: Convert to fraction form
   4,639.78/9,046.69 = 9,046.69/x
3. Step 3: Cross multiply
   4,639.78x = 9,046.69 × 9,046.69
4. Step 4: Simplify right side
   4,639.78x = 81,842,554.72
5. Step 5: Solve for x
   x = 81,842,554.72/4,639.78
6. Step 6: Final answer
   x = 17,639.31