Finding the Fourth Proportional to 1,946.73, 2,912.80 and 1,081.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,946.73 : 2,912.80 = 1,081.65 : x
2. Step 2: Convert to fraction form
   1,946.73/2,912.80 = 1,081.65/x
3. Step 3: Cross multiply
   1,946.73x = 2,912.80 × 1,081.65
4. Step 4: Simplify right side
   1,946.73x = 3,150,610.15
5. Step 5: Solve for x
   x = 3,150,610.15/1,946.73
6. Step 6: Final answer
   x = 1,618.42