Finding the Fourth Proportional to 2,123.55, 2,930.36 and 1,284.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.55 : 2,930.36 = 1,284.03 : x
2. Step 2: Convert to fraction form
   2,123.55/2,930.36 = 1,284.03/x
3. Step 3: Cross multiply
   2,123.55x = 2,930.36 × 1,284.03
4. Step 4: Simplify right side
   2,123.55x = 3,762,663.73
5. Step 5: Solve for x
   x = 3,762,663.73/2,123.55
6. Step 6: Final answer
   x = 1,771.87