Finding the Fourth Proportional to 1,047.21, 1,443.60 and 798.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.21 : 1,443.60 = 798.09 : x
2. Step 2: Convert to fraction form
   1,047.21/1,443.60 = 798.09/x
3. Step 3: Cross multiply
   1,047.21x = 1,443.60 × 798.09
4. Step 4: Simplify right side
   1,047.21x = 1,152,126.33
5. Step 5: Solve for x
   x = 1,152,126.33/1,047.21
6. Step 6: Final answer
   x = 1,100.19