Finding the Fourth Proportional to 1,358.72, 1,874.78 and 799.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.72 : 1,874.78 = 799.30 : x
2. Step 2: Convert to fraction form
   1,358.72/1,874.78 = 799.30/x
3. Step 3: Cross multiply
   1,358.72x = 1,874.78 × 799.30
4. Step 4: Simplify right side
   1,358.72x = 1,498,511.65
5. Step 5: Solve for x
   x = 1,498,511.65/1,358.72
6. Step 6: Final answer
   x = 1,102.88