Finding the Fourth Proportional to 2,285.98, 3,154.50 and 1,291.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,285.98 : 3,154.50 = 1,291.30 : x
2. Step 2: Convert to fraction form
   2,285.98/3,154.50 = 1,291.30/x
3. Step 3: Cross multiply
   2,285.98x = 3,154.50 × 1,291.30
4. Step 4: Simplify right side
   2,285.98x = 4,073,405.85
5. Step 5: Solve for x
   x = 4,073,405.85/2,285.98
6. Step 6: Final answer
   x = 1,781.91