Finding the Fourth Proportional to 2,561.12, 3,530.84 and 2,186.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.12 : 3,530.84 = 2,186.48 : x
2. Step 2: Convert to fraction form
   2,561.12/3,530.84 = 2,186.48/x
3. Step 3: Cross multiply
   2,561.12x = 3,530.84 × 2,186.48
4. Step 4: Simplify right side
   2,561.12x = 7,720,111.04
5. Step 5: Solve for x
   x = 7,720,111.04/2,561.12
6. Step 6: Final answer
   x = 3,014.35