Finding the Fourth Proportional to 9,479.57, 13,081.80 and 5,287.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,479.57 : 13,081.80 = 5,287.82 : x
2. Step 2: Convert to fraction form
   9,479.57/13,081.80 = 5,287.82/x
3. Step 3: Cross multiply
   9,479.57x = 13,081.80 × 5,287.82
4. Step 4: Simplify right side
   9,479.57x = 69,174,111.83
5. Step 5: Solve for x
   x = 69,174,111.83/9,479.57
6. Step 6: Final answer
   x = 7,297.18