Finding the Fourth Proportional to 2,561.48, 3,527.94 and 2,211.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.48 : 3,527.94 = 2,211.56 : x
2. Step 2: Convert to fraction form
   2,561.48/3,527.94 = 2,211.56/x
3. Step 3: Cross multiply
   2,561.48x = 3,527.94 × 2,211.56
4. Step 4: Simplify right side
   2,561.48x = 7,802,250.99
5. Step 5: Solve for x
   x = 7,802,250.99/2,561.48
6. Step 6: Final answer
   x = 3,045.99