Finding the Fourth Proportional to 2,123.67, 2,930.28 and 1,284.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.67 : 2,930.28 = 1,284.26 : x
2. Step 2: Convert to fraction form
   2,123.67/2,930.28 = 1,284.26/x
3. Step 3: Cross multiply
   2,123.67x = 2,930.28 × 1,284.26
4. Step 4: Simplify right side
   2,123.67x = 3,763,221.93
5. Step 5: Solve for x
   x = 3,763,221.93/2,123.67
6. Step 6: Final answer
   x = 1,772.04