Finding the Fourth Proportional to 1,398.53, 1,930.16 and 801.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.53 : 1,930.16 = 801.26 : x
2. Step 2: Convert to fraction form
   1,398.53/1,930.16 = 801.26/x
3. Step 3: Cross multiply
   1,398.53x = 1,930.16 × 801.26
4. Step 4: Simplify right side
   1,398.53x = 1,546,559.59
5. Step 5: Solve for x
   x = 1,546,559.59/1,398.53
6. Step 6: Final answer
   x = 1,105.84