Finding the Fourth Proportional to 13,078.71, 19,618.23 and 3,718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,078.71 : 19,618.23 = 3,718.72 : x
2. Step 2: Convert to fraction form
   13,078.71/19,618.23 = 3,718.72/x
3. Step 3: Cross multiply
   13,078.71x = 19,618.23 × 3,718.72
4. Step 4: Simplify right side
   13,078.71x = 72,954,704.27
5. Step 5: Solve for x
   x = 72,954,704.27/13,078.71
6. Step 6: Final answer
   x = 5,578.13