Finding the Fourth Proportional to 2,868.59, 3,957.31 and 1,805.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,868.59 : 3,957.31 = 1,805.87 : x
2. Step 2: Convert to fraction form
   2,868.59/3,957.31 = 1,805.87/x
3. Step 3: Cross multiply
   2,868.59x = 3,957.31 × 1,805.87
4. Step 4: Simplify right side
   2,868.59x = 7,146,387.41
5. Step 5: Solve for x
   x = 7,146,387.41/2,868.59
6. Step 6: Final answer
   x = 2,491.25