Finding the Fourth Proportional to 9,570.60, 13,207.50 and 5,378.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,570.60 : 13,207.50 = 5,378.82 : x
2. Step 2: Convert to fraction form
   9,570.60/13,207.50 = 5,378.82/x
3. Step 3: Cross multiply
   9,570.60x = 13,207.50 × 5,378.82
4. Step 4: Simplify right side
   9,570.60x = 71,040,765.15
5. Step 5: Solve for x
   x = 71,040,765.15/9,570.60
6. Step 6: Final answer
   x = 7,422.81