Finding the Fourth Proportional to 2,179.57, 3,005.76 and 1,681.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,179.57 : 3,005.76 = 1,681.42 : x
2. Step 2: Convert to fraction form
   2,179.57/3,005.76 = 1,681.42/x
3. Step 3: Cross multiply
   2,179.57x = 3,005.76 × 1,681.42
4. Step 4: Simplify right side
   2,179.57x = 5,053,944.98
5. Step 5: Solve for x
   x = 5,053,944.98/2,179.57
6. Step 6: Final answer
   x = 2,318.78