Finding the Fourth Proportional to 9,991.27, 13,786.37 and 5,741.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.27 : 13,786.37 = 5,741.51 : x
2. Step 2: Convert to fraction form
   9,991.27/13,786.37 = 5,741.51/x
3. Step 3: Cross multiply
   9,991.27x = 13,786.37 × 5,741.51
4. Step 4: Simplify right side
   9,991.27x = 79,154,537.41
5. Step 5: Solve for x
   x = 79,154,537.41/9,991.27
6. Step 6: Final answer
   x = 7,922.37