Finding the Fourth Proportional to 2,005.72, 3,004.53 and 1,679.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.72 : 3,004.53 = 1,679.91 : x
2. Step 2: Convert to fraction form
   2,005.72/3,004.53 = 1,679.91/x
3. Step 3: Cross multiply
   2,005.72x = 3,004.53 × 1,679.91
4. Step 4: Simplify right side
   2,005.72x = 5,047,331.59
5. Step 5: Solve for x
   x = 5,047,331.59/2,005.72
6. Step 6: Final answer
   x = 2,516.47