Finding the Fourth Proportional to 9,315.74, 12,855.54 and 5,227.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,315.74 : 12,855.54 = 5,227.52 : x
2. Step 2: Convert to fraction form
   9,315.74/12,855.54 = 5,227.52/x
3. Step 3: Cross multiply
   9,315.74x = 12,855.54 × 5,227.52
4. Step 4: Simplify right side
   9,315.74x = 67,202,592.46
5. Step 5: Solve for x
   x = 67,202,592.46/9,315.74
6. Step 6: Final answer
   x = 7,213.88