Finding the Fourth Proportional to 1,361.09, 1,878.45 and 801.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.09 : 1,878.45 = 801.69 : x
2. Step 2: Convert to fraction form
   1,361.09/1,878.45 = 801.69/x
3. Step 3: Cross multiply
   1,361.09x = 1,878.45 × 801.69
4. Step 4: Simplify right side
   1,361.09x = 1,505,934.58
5. Step 5: Solve for x
   x = 1,505,934.58/1,361.09
6. Step 6: Final answer
   x = 1,106.42