Finding the Fourth Proportional to 3,123.29, 4,687.82 and 2,186.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.29 : 4,687.82 = 2,186.57 : x
2. Step 2: Convert to fraction form
   3,123.29/4,687.82 = 2,186.57/x
3. Step 3: Cross multiply
   3,123.29x = 4,687.82 × 2,186.57
4. Step 4: Simplify right side
   3,123.29x = 10,250,246.58
5. Step 5: Solve for x
   x = 10,250,246.58/3,123.29
6. Step 6: Final answer
   x = 3,281.87