Finding the Fourth Proportional to 5,128.91, 7,694.39 and 1,619.46

Step by Step Solution

1. Step 1: Write the proportion equation
   5,128.91 : 7,694.39 = 1,619.46 : x
2. Step 2: Convert to fraction form
   5,128.91/7,694.39 = 1,619.46/x
3. Step 3: Cross multiply
   5,128.91x = 7,694.39 × 1,619.46
4. Step 4: Simplify right side
   5,128.91x = 12,460,760.88
5. Step 5: Solve for x
   x = 12,460,760.88/5,128.91
6. Step 6: Final answer
   x = 2,429.52