Finding the Fourth Proportional to 2,555.62, 3,527.11 and 1,561.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.62 : 3,527.11 = 1,561.15 : x
2. Step 2: Convert to fraction form
   2,555.62/3,527.11 = 1,561.15/x
3. Step 3: Cross multiply
   2,555.62x = 3,527.11 × 1,561.15
4. Step 4: Simplify right side
   2,555.62x = 5,506,322.34
5. Step 5: Solve for x
   x = 5,506,322.34/2,555.62
6. Step 6: Final answer
   x = 2,154.59