Finding the Fourth Proportional to 1,780.30, 2,456.73 and 1,034.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.30 : 2,456.73 = 1,034.21 : x
2. Step 2: Convert to fraction form
   1,780.30/2,456.73 = 1,034.21/x
3. Step 3: Cross multiply
   1,780.30x = 2,456.73 × 1,034.21
4. Step 4: Simplify right side
   1,780.30x = 2,540,774.73
5. Step 5: Solve for x
   x = 2,540,774.73/1,780.30
6. Step 6: Final answer
   x = 1,427.16