Finding the Fourth Proportional to 1,338.22, 2,003.59 and 874.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.22 : 2,003.59 = 874.81 : x
2. Step 2: Convert to fraction form
   1,338.22/2,003.59 = 874.81/x
3. Step 3: Cross multiply
   1,338.22x = 2,003.59 × 874.81
4. Step 4: Simplify right side
   1,338.22x = 1,752,760.57
5. Step 5: Solve for x
   x = 1,752,760.57/1,338.22
6. Step 6: Final answer
   x = 1,309.77