Finding the Fourth Proportional to 2,561.01, 3,836.50 and 1,329.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.01 : 3,836.50 = 1,329.23 : x
2. Step 2: Convert to fraction form
   2,561.01/3,836.50 = 1,329.23/x
3. Step 3: Cross multiply
   2,561.01x = 3,836.50 × 1,329.23
4. Step 4: Simplify right side
   2,561.01x = 5,099,590.90
5. Step 5: Solve for x
   x = 5,099,590.90/2,561.01
6. Step 6: Final answer
   x = 1,991.24