Finding the Fourth Proportional to 2,561.48, 3,840.63 and 1,079.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.48 : 3,840.63 = 1,079.94 : x
2. Step 2: Convert to fraction form
   2,561.48/3,840.63 = 1,079.94/x
3. Step 3: Cross multiply
   2,561.48x = 3,840.63 × 1,079.94
4. Step 4: Simplify right side
   2,561.48x = 4,147,655.59
5. Step 5: Solve for x
   x = 4,147,655.59/2,561.48
6. Step 6: Final answer
   x = 1,619.24