Finding the Fourth Proportional to 1,576.46, 2,174.61 and 1,078.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,576.46 : 2,174.61 = 1,078.82 : x
2. Step 2: Convert to fraction form
   1,576.46/2,174.61 = 1,078.82/x
3. Step 3: Cross multiply
   1,576.46x = 2,174.61 × 1,078.82
4. Step 4: Simplify right side
   1,576.46x = 2,346,012.76
5. Step 5: Solve for x
   x = 2,346,012.76/1,576.46
6. Step 6: Final answer
   x = 1,488.15