Finding the Fourth Proportional to 1,780.36, 2,456.96 and 994.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.36 : 2,456.96 = 994.55 : x
2. Step 2: Convert to fraction form
   1,780.36/2,456.96 = 994.55/x
3. Step 3: Cross multiply
   1,780.36x = 2,456.96 × 994.55
4. Step 4: Simplify right side
   1,780.36x = 2,443,570.74
5. Step 5: Solve for x
   x = 2,443,570.74/1,780.36
6. Step 6: Final answer
   x = 1,372.52