Finding the Fourth Proportional to 9,317.21, 12,856.67 and 5,338.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,317.21 : 12,856.67 = 5,338.09 : x
2. Step 2: Convert to fraction form
   9,317.21/12,856.67 = 5,338.09/x
3. Step 3: Cross multiply
   9,317.21x = 12,856.67 × 5,338.09
4. Step 4: Simplify right side
   9,317.21x = 68,630,061.56
5. Step 5: Solve for x
   x = 68,630,061.56/9,317.21
6. Step 6: Final answer
   x = 7,365.95