Finding the Fourth Proportional to 2,021.45, 2,789.90 and 1,235.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.45 : 2,789.90 = 1,235.34 : x
2. Step 2: Convert to fraction form
   2,021.45/2,789.90 = 1,235.34/x
3. Step 3: Cross multiply
   2,021.45x = 2,789.90 × 1,235.34
4. Step 4: Simplify right side
   2,021.45x = 3,446,468.89
5. Step 5: Solve for x
   x = 3,446,468.89/2,021.45
6. Step 6: Final answer
   x = 1,704.95