Finding the Fourth Proportional to 9,131.67, 12,601.71 and 6,338.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.67 : 12,601.71 = 6,338.79 : x
2. Step 2: Convert to fraction form
   9,131.67/12,601.71 = 6,338.79/x
3. Step 3: Cross multiply
   9,131.67x = 12,601.71 × 6,338.79
4. Step 4: Simplify right side
   9,131.67x = 79,879,593.33
5. Step 5: Solve for x
   x = 79,879,593.33/9,131.67
6. Step 6: Final answer
   x = 8,747.53