Finding the Fourth Proportional to 2,561.82, 3,840.66 and 2,356.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.82 : 3,840.66 = 2,356.80 : x
2. Step 2: Convert to fraction form
   2,561.82/3,840.66 = 2,356.80/x
3. Step 3: Cross multiply
   2,561.82x = 3,840.66 × 2,356.80
4. Step 4: Simplify right side
   2,561.82x = 9,051,667.49
5. Step 5: Solve for x
   x = 9,051,667.49/2,561.82
6. Step 6: Final answer
   x = 3,533.30