Finding the Fourth Proportional to 9,885.35, 13,641.26 and 5,636.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,885.35 : 13,641.26 = 5,636.51 : x
2. Step 2: Convert to fraction form
   9,885.35/13,641.26 = 5,636.51/x
3. Step 3: Cross multiply
   9,885.35x = 13,641.26 × 5,636.51
4. Step 4: Simplify right side
   9,885.35x = 76,889,104.32
5. Step 5: Solve for x
   x = 76,889,104.32/9,885.35
6. Step 6: Final answer
   x = 7,778.09