Finding the Fourth Proportional to 1,381.59, 2,072.41 and 559.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.59 : 2,072.41 = 559.69 : x
2. Step 2: Convert to fraction form
   1,381.59/2,072.41 = 559.69/x
3. Step 3: Cross multiply
   1,381.59x = 2,072.41 × 559.69
4. Step 4: Simplify right side
   1,381.59x = 1,159,900.57
5. Step 5: Solve for x
   x = 1,159,900.57/1,381.59
6. Step 6: Final answer
   x = 839.54