Finding the Fourth Proportional to 1,405.92, 1,939.68 and 882.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.92 : 1,939.68 = 882.24 : x
2. Step 2: Convert to fraction form
   1,405.92/1,939.68 = 882.24/x
3. Step 3: Cross multiply
   1,405.92x = 1,939.68 × 882.24
4. Step 4: Simplify right side
   1,405.92x = 1,711,263.28
5. Step 5: Solve for x
   x = 1,711,263.28/1,405.92
6. Step 6: Final answer
   x = 1,217.18