Finding the Fourth Proportional to 9,410.37, 12,986.49 and 5,431.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,410.37 : 12,986.49 = 5,431.69 : x
2. Step 2: Convert to fraction form
   9,410.37/12,986.49 = 5,431.69/x
3. Step 3: Cross multiply
   9,410.37x = 12,986.49 × 5,431.69
4. Step 4: Simplify right side
   9,410.37x = 70,538,587.87
5. Step 5: Solve for x
   x = 70,538,587.87/9,410.37
6. Step 6: Final answer
   x = 7,495.84