Finding the Fourth Proportional to 9,881.29, 13,636.37 and 5,405.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,881.29 : 13,636.37 = 5,405.03 : x
2. Step 2: Convert to fraction form
   9,881.29/13,636.37 = 5,405.03/x
3. Step 3: Cross multiply
   9,881.29x = 13,636.37 × 5,405.03
4. Step 4: Simplify right side
   9,881.29x = 73,704,934.27
5. Step 5: Solve for x
   x = 73,704,934.27/9,881.29
6. Step 6: Final answer
   x = 7,459.04