Finding the Fourth Proportional to 1,436.82, 2,154.67 and 559.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.82 : 2,154.67 = 559.21 : x
2. Step 2: Convert to fraction form
   1,436.82/2,154.67 = 559.21/x
3. Step 3: Cross multiply
   1,436.82x = 2,154.67 × 559.21
4. Step 4: Simplify right side
   1,436.82x = 1,204,911.72
5. Step 5: Solve for x
   x = 1,204,911.72/1,436.82
6. Step 6: Final answer
   x = 838.59