Finding the Fourth Proportional to 9,357.81, 12,913.77 and 5,379.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,357.81 : 12,913.77 = 5,379.69 : x
2. Step 2: Convert to fraction form
   9,357.81/12,913.77 = 5,379.69/x
3. Step 3: Cross multiply
   9,357.81x = 12,913.77 × 5,379.69
4. Step 4: Simplify right side
   9,357.81x = 69,472,079.33
5. Step 5: Solve for x
   x = 69,472,079.33/9,357.81
6. Step 6: Final answer
   x = 7,423.97