Finding the Fourth Proportional to 2,123.69, 2,930.75 and 1,284.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.69 : 2,930.75 = 1,284.54 : x
2. Step 2: Convert to fraction form
   2,123.69/2,930.75 = 1,284.54/x
3. Step 3: Cross multiply
   2,123.69x = 2,930.75 × 1,284.54
4. Step 4: Simplify right side
   2,123.69x = 3,764,669.49
5. Step 5: Solve for x
   x = 3,764,669.49/2,123.69
6. Step 6: Final answer
   x = 1,772.71