Finding the Fourth Proportional to 9,379.56, 12,945.32 and 5,399.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.56 : 12,945.32 = 5,399.84 : x
2. Step 2: Convert to fraction form
   9,379.56/12,945.32 = 5,399.84/x
3. Step 3: Cross multiply
   9,379.56x = 12,945.32 × 5,399.84
4. Step 4: Simplify right side
   9,379.56x = 69,902,565.02
5. Step 5: Solve for x
   x = 69,902,565.02/9,379.56
6. Step 6: Final answer
   x = 7,452.65