Finding the Fourth Proportional to 1,398.03, 1,929.29 and 800.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.03 : 1,929.29 = 800.54 : x
2. Step 2: Convert to fraction form
   1,398.03/1,929.29 = 800.54/x
3. Step 3: Cross multiply
   1,398.03x = 1,929.29 × 800.54
4. Step 4: Simplify right side
   1,398.03x = 1,544,463.17
5. Step 5: Solve for x
   x = 1,544,463.17/1,398.03
6. Step 6: Final answer
   x = 1,104.74