Finding the Fourth Proportional to 2,123.54, 2,930.92 and 1,284.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.54 : 2,930.92 = 1,284.38 : x
2. Step 2: Convert to fraction form
   2,123.54/2,930.92 = 1,284.38/x
3. Step 3: Cross multiply
   2,123.54x = 2,930.92 × 1,284.38
4. Step 4: Simplify right side
   2,123.54x = 3,764,415.03
5. Step 5: Solve for x
   x = 3,764,415.03/2,123.54
6. Step 6: Final answer
   x = 1,772.71