Finding the Fourth Proportional to 2,289.51, 3,159.27 and 1,281.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.51 : 3,159.27 = 1,281.15 : x
2. Step 2: Convert to fraction form
   2,289.51/3,159.27 = 1,281.15/x
3. Step 3: Cross multiply
   2,289.51x = 3,159.27 × 1,281.15
4. Step 4: Simplify right side
   2,289.51x = 4,047,498.76
5. Step 5: Solve for x
   x = 4,047,498.76/2,289.51
6. Step 6: Final answer
   x = 1,767.84