Finding the Fourth Proportional to 1,398.83, 1,930.55 and 801.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.83 : 1,930.55 = 801.54 : x
2. Step 2: Convert to fraction form
   1,398.83/1,930.55 = 801.54/x
3. Step 3: Cross multiply
   1,398.83x = 1,930.55 × 801.54
4. Step 4: Simplify right side
   1,398.83x = 1,547,409.04
5. Step 5: Solve for x
   x = 1,547,409.04/1,398.83
6. Step 6: Final answer
   x = 1,106.22