Finding the Fourth Proportional to 9,885.51, 13,641.42 and 5,408.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,885.51 : 13,641.42 = 5,408.37 : x
2. Step 2: Convert to fraction form
   9,885.51/13,641.42 = 5,408.37/x
3. Step 3: Cross multiply
   9,885.51x = 13,641.42 × 5,408.37
4. Step 4: Simplify right side
   9,885.51x = 73,777,846.69
5. Step 5: Solve for x
   x = 73,777,846.69/9,885.51
6. Step 6: Final answer
   x = 7,463.23