Finding the Fourth Proportional to 5,111.36, 7,661.62 and 2,915.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.36 : 7,661.62 = 2,915.38 : x
2. Step 2: Convert to fraction form
   5,111.36/7,661.62 = 2,915.38/x
3. Step 3: Cross multiply
   5,111.36x = 7,661.62 × 2,915.38
4. Step 4: Simplify right side
   5,111.36x = 22,336,480.83
5. Step 5: Solve for x
   x = 22,336,480.83/5,111.36
6. Step 6: Final answer
   x = 4,369.97