Finding the Fourth Proportional to 8,926.95, 12,315.33 and 5,388.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,926.95 : 12,315.33 = 5,388.12 : x
2. Step 2: Convert to fraction form
   8,926.95/12,315.33 = 5,388.12/x
3. Step 3: Cross multiply
   8,926.95x = 12,315.33 × 5,388.12
4. Step 4: Simplify right side
   8,926.95x = 66,356,475.88
5. Step 5: Solve for x
   x = 66,356,475.88/8,926.95
6. Step 6: Final answer
   x = 7,433.28