Finding the Fourth Proportional to 9,570.69, 13,207.59 and 5,378.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,570.69 : 13,207.59 = 5,378.67 : x
2. Step 2: Convert to fraction form
   9,570.69/13,207.59 = 5,378.67/x
3. Step 3: Cross multiply
   9,570.69x = 13,207.59 × 5,378.67
4. Step 4: Simplify right side
   9,570.69x = 71,039,268.11
5. Step 5: Solve for x
   x = 71,039,268.11/9,570.69
6. Step 6: Final answer
   x = 7,422.59