Finding the Fourth Proportional to 9,338.81, 12,887.43 and 5,360.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,338.81 : 12,887.43 = 5,360.55 : x
2. Step 2: Convert to fraction form
   9,338.81/12,887.43 = 5,360.55/x
3. Step 3: Cross multiply
   9,338.81x = 12,887.43 × 5,360.55
4. Step 4: Simplify right side
   9,338.81x = 69,083,712.89
5. Step 5: Solve for x
   x = 69,083,712.89/9,338.81
6. Step 6: Final answer
   x = 7,397.49