Finding the Fourth Proportional to 1,979.78, 2,732.04 and 1,281.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,979.78 : 2,732.04 = 1,281.56 : x
2. Step 2: Convert to fraction form
   1,979.78/2,732.04 = 1,281.56/x
3. Step 3: Cross multiply
   1,979.78x = 2,732.04 × 1,281.56
4. Step 4: Simplify right side
   1,979.78x = 3,501,273.18
5. Step 5: Solve for x
   x = 3,501,273.18/1,979.78
6. Step 6: Final answer
   x = 1,768.52