Finding the Fourth Proportional to 9,899.37, 13,661.10 and 5,423.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,899.37 : 13,661.10 = 5,423.27 : x
2. Step 2: Convert to fraction form
   9,899.37/13,661.10 = 5,423.27/x
3. Step 3: Cross multiply
   9,899.37x = 13,661.10 × 5,423.27
4. Step 4: Simplify right side
   9,899.37x = 74,087,765.49
5. Step 5: Solve for x
   x = 74,087,765.49/9,899.37
6. Step 6: Final answer
   x = 7,484.09