Finding the Fourth Proportional to 2,285.69, 3,154.55 and 1,291.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,285.69 : 3,154.55 = 1,291.28 : x
2. Step 2: Convert to fraction form
   2,285.69/3,154.55 = 1,291.28/x
3. Step 3: Cross multiply
   2,285.69x = 3,154.55 × 1,291.28
4. Step 4: Simplify right side
   2,285.69x = 4,073,385.09
5. Step 5: Solve for x
   x = 4,073,385.09/2,285.69
6. Step 6: Final answer
   x = 1,782.13