Finding the Fourth Proportional to 2,285.69, 3,154.39 and 1,291.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,285.69 : 3,154.39 = 1,291.06 : x
2. Step 2: Convert to fraction form
   2,285.69/3,154.39 = 1,291.06/x
3. Step 3: Cross multiply
   2,285.69x = 3,154.39 × 1,291.06
4. Step 4: Simplify right side
   2,285.69x = 4,072,523.60
5. Step 5: Solve for x
   x = 4,072,523.60/2,285.69
6. Step 6: Final answer
   x = 1,781.75