Finding the Fourth Proportional to 10,089.72, 13,924.27 and 8,408.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,089.72 : 13,924.27 = 8,408.31 : x
2. Step 2: Convert to fraction form
   10,089.72/13,924.27 = 8,408.31/x
3. Step 3: Cross multiply
   10,089.72x = 13,924.27 × 8,408.31
4. Step 4: Simplify right side
   10,089.72x = 117,079,654.46
5. Step 5: Solve for x
   x = 117,079,654.46/10,089.72
6. Step 6: Final answer
   x = 11,603.85