Finding the Fourth Proportional to 1,780.43, 2,456.98 and 994.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.43 : 2,456.98 = 994.53 : x
2. Step 2: Convert to fraction form
   1,780.43/2,456.98 = 994.53/x
3. Step 3: Cross multiply
   1,780.43x = 2,456.98 × 994.53
4. Step 4: Simplify right side
   1,780.43x = 2,443,540.32
5. Step 5: Solve for x
   x = 2,443,540.32/1,780.43
6. Step 6: Final answer
   x = 1,372.44