Finding the Fourth Proportional to 8,719.48, 13,075.12 and 3,168.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,719.48 : 13,075.12 = 3,168.91 : x
2. Step 2: Convert to fraction form
   8,719.48/13,075.12 = 3,168.91/x
3. Step 3: Cross multiply
   8,719.48x = 13,075.12 × 3,168.91
4. Step 4: Simplify right side
   8,719.48x = 41,433,878.52
5. Step 5: Solve for x
   x = 41,433,878.52/8,719.48
6. Step 6: Final answer
   x = 4,751.87