Finding the Fourth Proportional to 1,990.94, 2,747.81 and 1,151.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.94 : 2,747.81 = 1,151.65 : x
2. Step 2: Convert to fraction form
   1,990.94/2,747.81 = 1,151.65/x
3. Step 3: Cross multiply
   1,990.94x = 2,747.81 × 1,151.65
4. Step 4: Simplify right side
   1,990.94x = 3,164,495.89
5. Step 5: Solve for x
   x = 3,164,495.89/1,990.94
6. Step 6: Final answer
   x = 1,589.45