Finding the Fourth Proportional to 2,561.19, 3,533.36 and 1,566.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.19 : 3,533.36 = 1,566.15 : x
2. Step 2: Convert to fraction form
   2,561.19/3,533.36 = 1,566.15/x
3. Step 3: Cross multiply
   2,561.19x = 3,533.36 × 1,566.15
4. Step 4: Simplify right side
   2,561.19x = 5,533,771.76
5. Step 5: Solve for x
   x = 5,533,771.76/2,561.19
6. Step 6: Final answer
   x = 2,160.63