Finding the Fourth Proportional to 1,358.18, 1,874.30 and 798.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.18 : 1,874.30 = 798.72 : x
2. Step 2: Convert to fraction form
   1,358.18/1,874.30 = 798.72/x
3. Step 3: Cross multiply
   1,358.18x = 1,874.30 × 798.72
4. Step 4: Simplify right side
   1,358.18x = 1,497,036.90
5. Step 5: Solve for x
   x = 1,497,036.90/1,358.18
6. Step 6: Final answer
   x = 1,102.24