Finding the Fourth Proportional to 2,636.40, 3,955.07 and 881.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.40 : 3,955.07 = 881.23 : x
2. Step 2: Convert to fraction form
   2,636.40/3,955.07 = 881.23/x
3. Step 3: Cross multiply
   2,636.40x = 3,955.07 × 881.23
4. Step 4: Simplify right side
   2,636.40x = 3,485,316.45
5. Step 5: Solve for x
   x = 3,485,316.45/2,636.40
6. Step 6: Final answer
   x = 1,322.00