Finding the Fourth Proportional to 9,358.38, 12,915.45 and 5,381.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,358.38 : 12,915.45 = 5,381.82 : x
2. Step 2: Convert to fraction form
   9,358.38/12,915.45 = 5,381.82/x
3. Step 3: Cross multiply
   9,358.38x = 12,915.45 × 5,381.82
4. Step 4: Simplify right side
   9,358.38x = 69,508,627.12
5. Step 5: Solve for x
   x = 69,508,627.12/9,358.38
6. Step 6: Final answer
   x = 7,427.42