Finding the Fourth Proportional to 9,478.57, 13,080.42 and 5,286.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,478.57 : 13,080.42 = 5,286.82 : x
2. Step 2: Convert to fraction form
   9,478.57/13,080.42 = 5,286.82/x
3. Step 3: Cross multiply
   9,478.57x = 13,080.42 × 5,286.82
4. Step 4: Simplify right side
   9,478.57x = 69,153,734.23
5. Step 5: Solve for x
   x = 69,153,734.23/9,478.57
6. Step 6: Final answer
   x = 7,295.80