Finding the Fourth Proportional to 2,153.82, 3,233.16 and 1,278.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153.82 : 3,233.16 = 1,278.22 : x
2. Step 2: Convert to fraction form
   2,153.82/3,233.16 = 1,278.22/x
3. Step 3: Cross multiply
   2,153.82x = 3,233.16 × 1,278.22
4. Step 4: Simplify right side
   2,153.82x = 4,132,689.78
5. Step 5: Solve for x
   x = 4,132,689.78/2,153.82
6. Step 6: Final answer
   x = 1,918.77