Finding the Fourth Proportional to 12,719.65, 19,080.69 and 3,952.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,719.65 : 19,080.69 = 3,952.21 : x
2. Step 2: Convert to fraction form
   12,719.65/19,080.69 = 3,952.21/x
3. Step 3: Cross multiply
   12,719.65x = 19,080.69 × 3,952.21
4. Step 4: Simplify right side
   12,719.65x = 75,410,893.82
5. Step 5: Solve for x
   x = 75,410,893.82/12,719.65
6. Step 6: Final answer
   x = 5,928.69