Finding the Fourth Proportional to 1,402.24, 2,104.80 and 1,081.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.24 : 2,104.80 = 1,081.12 : x
2. Step 2: Convert to fraction form
   1,402.24/2,104.80 = 1,081.12/x
3. Step 3: Cross multiply
   1,402.24x = 2,104.80 × 1,081.12
4. Step 4: Simplify right side
   1,402.24x = 2,275,541.38
5. Step 5: Solve for x
   x = 2,275,541.38/1,402.24
6. Step 6: Final answer
   x = 1,622.79