Finding the Fourth Proportional to 1,942.56, 2,679.57 and 1,279.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,942.56 : 2,679.57 = 1,279.17 : x
2. Step 2: Convert to fraction form
   1,942.56/2,679.57 = 1,279.17/x
3. Step 3: Cross multiply
   1,942.56x = 2,679.57 × 1,279.17
4. Step 4: Simplify right side
   1,942.56x = 3,427,625.56
5. Step 5: Solve for x
   x = 3,427,625.56/1,942.56
6. Step 6: Final answer
   x = 1,764.49