Finding the Third Proportional to 4,158 and 9,008.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,158 : 9,008.72 = 9,008.72 : x
2. Step 2: Convert to fraction form
   4,158/9,008.72 = 9,008.72/x
3. Step 3: Cross multiply
   4,158x = 9,008.72 × 9,008.72
4. Step 4: Simplify right side
   4,158x = 81,157,013.52
5. Step 5: Solve for x
   x = 81,157,013.52/4,158
6. Step 6: Final answer
   x = 19,518.28