Finding the Fourth Proportional to 9,315.84, 12,855.68 and 5,336.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,315.84 : 12,855.68 = 5,336.72 : x
2. Step 2: Convert to fraction form
   9,315.84/12,855.68 = 5,336.72/x
3. Step 3: Cross multiply
   9,315.84x = 12,855.68 × 5,336.72
4. Step 4: Simplify right side
   9,315.84x = 68,607,164.57
5. Step 5: Solve for x
   x = 68,607,164.57/9,315.84
6. Step 6: Final answer
   x = 7,364.57