Finding the Fourth Proportional to 9,881.24, 13,636.32 and 5,405.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,881.24 : 13,636.32 = 5,405.29 : x
2. Step 2: Convert to fraction form
   9,881.24/13,636.32 = 5,405.29/x
3. Step 3: Cross multiply
   9,881.24x = 13,636.32 × 5,405.29
4. Step 4: Simplify right side
   9,881.24x = 73,708,168.92
5. Step 5: Solve for x
   x = 73,708,168.92/9,881.24
6. Step 6: Final answer
   x = 7,459.40