Finding the Fourth Proportional to 8,719.38, 13,071.72 and 3,785.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,719.38 : 13,071.72 = 3,785.31 : x
2. Step 2: Convert to fraction form
   8,719.38/13,071.72 = 3,785.31/x
3. Step 3: Cross multiply
   8,719.38x = 13,071.72 × 3,785.31
4. Step 4: Simplify right side
   8,719.38x = 49,480,512.43
5. Step 5: Solve for x
   x = 49,480,512.43/8,719.38
6. Step 6: Final answer
   x = 5,674.77