Finding the Third Proportional to 4,191.09 and 8,726.63

Step by Step Solution

1. Step 1: Write the proportion equation
   4,191.09 : 8,726.63 = 8,726.63 : x
2. Step 2: Convert to fraction form
   4,191.09/8,726.63 = 8,726.63/x
3. Step 3: Cross multiply
   4,191.09x = 8,726.63 × 8,726.63
4. Step 4: Simplify right side
   4,191.09x = 76,153,983.89
5. Step 5: Solve for x
   x = 76,153,983.89/4,191.09
6. Step 6: Final answer
   x = 18,170.43