Finding the Fourth Proportional to 2,555.76, 3,527.28 and 1,561.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.76 : 3,527.28 = 1,561.17 : x
2. Step 2: Convert to fraction form
   2,555.76/3,527.28 = 1,561.17/x
3. Step 3: Cross multiply
   2,555.76x = 3,527.28 × 1,561.17
4. Step 4: Simplify right side
   2,555.76x = 5,506,683.72
5. Step 5: Solve for x
   x = 5,506,683.72/2,555.76
6. Step 6: Final answer
   x = 2,154.62