Finding the Fourth Proportional to 1,559.34, 2,149.81 and 1,292.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.34 : 2,149.81 = 1,292.78 : x
2. Step 2: Convert to fraction form
   1,559.34/2,149.81 = 1,292.78/x
3. Step 3: Cross multiply
   1,559.34x = 2,149.81 × 1,292.78
4. Step 4: Simplify right side
   1,559.34x = 2,779,233.51
5. Step 5: Solve for x
   x = 2,779,233.51/1,559.34
6. Step 6: Final answer
   x = 1,782.31