Finding the Fourth Proportional to 9,681.09, 13,358.82 and 5,431.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,681.09 : 13,358.82 = 5,431.27 : x
2. Step 2: Convert to fraction form
   9,681.09/13,358.82 = 5,431.27/x
3. Step 3: Cross multiply
   9,681.09x = 13,358.82 × 5,431.27
4. Step 4: Simplify right side
   9,681.09x = 72,555,291.51
5. Step 5: Solve for x
   x = 72,555,291.51/9,681.09
6. Step 6: Final answer
   x = 7,494.54