Finding the Fourth Proportional to 1,559.53, 2,147.74 and 1,436.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.53 : 2,147.74 = 1,436.41 : x
2. Step 2: Convert to fraction form
   1,559.53/2,147.74 = 1,436.41/x
3. Step 3: Cross multiply
   1,559.53x = 2,147.74 × 1,436.41
4. Step 4: Simplify right side
   1,559.53x = 3,085,035.21
5. Step 5: Solve for x
   x = 3,085,035.21/1,559.53
6. Step 6: Final answer
   x = 1,978.18