Finding the Fourth Proportional to 2,185.52, 3,278.86 and 1,259.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.52 : 3,278.86 = 1,259.41 : x
2. Step 2: Convert to fraction form
   2,185.52/3,278.86 = 1,259.41/x
3. Step 3: Cross multiply
   2,185.52x = 3,278.86 × 1,259.41
4. Step 4: Simplify right side
   2,185.52x = 4,129,429.07
5. Step 5: Solve for x
   x = 4,129,429.07/2,185.52
6. Step 6: Final answer
   x = 1,889.45