Finding the Fourth Proportional to 2,561.87, 3,535.32 and 1,427.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.87 : 3,535.32 = 1,427.55 : x
2. Step 2: Convert to fraction form
   2,561.87/3,535.32 = 1,427.55/x
3. Step 3: Cross multiply
   2,561.87x = 3,535.32 × 1,427.55
4. Step 4: Simplify right side
   2,561.87x = 5,046,844.57
5. Step 5: Solve for x
   x = 5,046,844.57/2,561.87
6. Step 6: Final answer
   x = 1,969.99