Finding the Fourth Proportional to 9,339.54, 12,888.10 and 5,360.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,339.54 : 12,888.10 = 5,360.56 : x
2. Step 2: Convert to fraction form
   9,339.54/12,888.10 = 5,360.56/x
3. Step 3: Cross multiply
   9,339.54x = 12,888.10 × 5,360.56
4. Step 4: Simplify right side
   9,339.54x = 69,087,433.34
5. Step 5: Solve for x
   x = 69,087,433.34/9,339.54
6. Step 6: Final answer
   x = 7,397.31