Finding the Fourth Proportional to 1,182.78, 1,764.92 and 1,059.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.78 : 1,764.92 = 1,059.79 : x
2. Step 2: Convert to fraction form
   1,182.78/1,764.92 = 1,059.79/x
3. Step 3: Cross multiply
   1,182.78x = 1,764.92 × 1,059.79
4. Step 4: Simplify right side
   1,182.78x = 1,870,444.57
5. Step 5: Solve for x
   x = 1,870,444.57/1,182.78
6. Step 6: Final answer
   x = 1,581.40