Finding the Fourth Proportional to 1,049.56, 1,570.38 and 994

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.56 : 1,570.38 = 994 : x
2. Step 2: Convert to fraction form
   1,049.56/1,570.38 = 994/x
3. Step 3: Cross multiply
   1,049.56x = 1,570.38 × 994
4. Step 4: Simplify right side
   1,049.56x = 1,560,957.72
5. Step 5: Solve for x
   x = 1,560,957.72/1,049.56
6. Step 6: Final answer
   x = 1,487.25