Finding the Fourth Proportional to 1,440.25, 2,156.22 and 1,091.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.25 : 2,156.22 = 1,091.54 : x
2. Step 2: Convert to fraction form
   1,440.25/2,156.22 = 1,091.54/x
3. Step 3: Cross multiply
   1,440.25x = 2,156.22 × 1,091.54
4. Step 4: Simplify right side
   1,440.25x = 2,353,605.77
5. Step 5: Solve for x
   x = 2,353,605.77/1,440.25
6. Step 6: Final answer
   x = 1,634.17