Finding the Fourth Proportional to 3,123.87, 4,309.71 and 1,796.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123.87 : 4,309.71 = 1,796.78 : x
2. Step 2: Convert to fraction form
   3,123.87/4,309.71 = 1,796.78/x
3. Step 3: Cross multiply
   3,123.87x = 4,309.71 × 1,796.78
4. Step 4: Simplify right side
   3,123.87x = 7,743,604.77
5. Step 5: Solve for x
   x = 7,743,604.77/3,123.87
6. Step 6: Final answer
   x = 2,478.85