Finding the Fourth Proportional to 1,780.04, 2,456.56 and 994.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.04 : 2,456.56 = 994.09 : x
2. Step 2: Convert to fraction form
   1,780.04/2,456.56 = 994.09/x
3. Step 3: Cross multiply
   1,780.04x = 2,456.56 × 994.09
4. Step 4: Simplify right side
   1,780.04x = 2,442,029.45
5. Step 5: Solve for x
   x = 2,442,029.45/1,780.04
6. Step 6: Final answer
   x = 1,371.90