Finding the Third Proportional to 4,458.38 and 9,058.50

Step by Step Solution

1. Step 1: Write the proportion equation
   4,458.38 : 9,058.50 = 9,058.50 : x
2. Step 2: Convert to fraction form
   4,458.38/9,058.50 = 9,058.50/x
3. Step 3: Cross multiply
   4,458.38x = 9,058.50 × 9,058.50
4. Step 4: Simplify right side
   4,458.38x = 82,056,422.25
5. Step 5: Solve for x
   x = 82,056,422.25/4,458.38
6. Step 6: Final answer
   x = 18,405.01