Finding the Fourth Proportional to 9,479.63, 13,081.89 and 5,287.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,479.63 : 13,081.89 = 5,287.88 : x
2. Step 2: Convert to fraction form
   9,479.63/13,081.89 = 5,287.88/x
3. Step 3: Cross multiply
   9,479.63x = 13,081.89 × 5,287.88
4. Step 4: Simplify right side
   9,479.63x = 69,175,399.08
5. Step 5: Solve for x
   x = 69,175,399.08/9,479.63
6. Step 6: Final answer
   x = 7,297.27