Finding the Fourth Proportional to 1,559.39, 2,149.47 and 1,227.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.39 : 2,149.47 = 1,227.29 : x
2. Step 2: Convert to fraction form
   1,559.39/2,149.47 = 1,227.29/x
3. Step 3: Cross multiply
   1,559.39x = 2,149.47 × 1,227.29
4. Step 4: Simplify right side
   1,559.39x = 2,638,012.29
5. Step 5: Solve for x
   x = 2,638,012.29/1,559.39
6. Step 6: Final answer
   x = 1,691.70