Finding the Fourth Proportional to 11,272.41, 16,916.18 and 4,258.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,272.41 : 16,916.18 = 4,258.89 : x
2. Step 2: Convert to fraction form
   11,272.41/16,916.18 = 4,258.89/x
3. Step 3: Cross multiply
   11,272.41x = 16,916.18 × 4,258.89
4. Step 4: Simplify right side
   11,272.41x = 72,044,128.55
5. Step 5: Solve for x
   x = 72,044,128.55/11,272.41
6. Step 6: Final answer
   x = 6,391.19