Finding the Fourth Proportional to 1,406.40, 1,940.88 and 882.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.40 : 1,940.88 = 882.72 : x
2. Step 2: Convert to fraction form
   1,406.40/1,940.88 = 882.72/x
3. Step 3: Cross multiply
   1,406.40x = 1,940.88 × 882.72
4. Step 4: Simplify right side
   1,406.40x = 1,713,253.59
5. Step 5: Solve for x
   x = 1,713,253.59/1,406.40
6. Step 6: Final answer
   x = 1,218.18