Finding the Fourth Proportional to 9,572.69, 13,210.35 and 5,380.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,572.69 : 13,210.35 = 5,380.67 : x
2. Step 2: Convert to fraction form
   9,572.69/13,210.35 = 5,380.67/x
3. Step 3: Cross multiply
   9,572.69x = 13,210.35 × 5,380.67
4. Step 4: Simplify right side
   9,572.69x = 71,080,533.93
5. Step 5: Solve for x
   x = 71,080,533.93/9,572.69
6. Step 6: Final answer
   x = 7,425.35