Finding the Fourth Proportional to 1,360.90, 1,877.72 and 801.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.90 : 1,877.72 = 801.39 : x
2. Step 2: Convert to fraction form
   1,360.90/1,877.72 = 801.39/x
3. Step 3: Cross multiply
   1,360.90x = 1,877.72 × 801.39
4. Step 4: Simplify right side
   1,360.90x = 1,504,786.03
5. Step 5: Solve for x
   x = 1,504,786.03/1,360.90
6. Step 6: Final answer
   x = 1,105.73