Finding the Fourth Proportional to 9,358.96, 12,911.52 and 5,379.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,358.96 : 12,911.52 = 5,379.16 : x
2. Step 2: Convert to fraction form
   9,358.96/12,911.52 = 5,379.16/x
3. Step 3: Cross multiply
   9,358.96x = 12,911.52 × 5,379.16
4. Step 4: Simplify right side
   9,358.96x = 69,453,131.92
5. Step 5: Solve for x
   x = 69,453,131.92/9,358.96
6. Step 6: Final answer
   x = 7,421.03