Finding the Fourth Proportional to 9,881.33, 13,636.25 and 5,405.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,881.33 : 13,636.25 = 5,405.06 : x
2. Step 2: Convert to fraction form
   9,881.33/13,636.25 = 5,405.06/x
3. Step 3: Cross multiply
   9,881.33x = 13,636.25 × 5,405.06
4. Step 4: Simplify right side
   9,881.33x = 73,704,654.22
5. Step 5: Solve for x
   x = 73,704,654.22/9,881.33
6. Step 6: Final answer
   x = 7,458.98