Finding the Fourth Proportional to 1,256.30, 1,735.05 and 979.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.30 : 1,735.05 = 979.82 : x
2. Step 2: Convert to fraction form
   1,256.30/1,735.05 = 979.82/x
3. Step 3: Cross multiply
   1,256.30x = 1,735.05 × 979.82
4. Step 4: Simplify right side
   1,256.30x = 1,700,036.69
5. Step 5: Solve for x
   x = 1,700,036.69/1,256.30
6. Step 6: Final answer
   x = 1,353.21