Finding the Fourth Proportional to 1,352.28, 1,866.50 and 881.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,352.28 : 1,866.50 = 881.35 : x
2. Step 2: Convert to fraction form
   1,352.28/1,866.50 = 881.35/x
3. Step 3: Cross multiply
   1,352.28x = 1,866.50 × 881.35
4. Step 4: Simplify right side
   1,352.28x = 1,645,039.78
5. Step 5: Solve for x
   x = 1,645,039.78/1,352.28
6. Step 6: Final answer
   x = 1,216.49