Finding the Fourth Proportional to 1,440.69, 1,981.51 and 1,173.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.69 : 1,981.51 = 1,173.23 : x
2. Step 2: Convert to fraction form
   1,440.69/1,981.51 = 1,173.23/x
3. Step 3: Cross multiply
   1,440.69x = 1,981.51 × 1,173.23
4. Step 4: Simplify right side
   1,440.69x = 2,324,779.31
5. Step 5: Solve for x
   x = 2,324,779.31/1,440.69
6. Step 6: Final answer
   x = 1,613.66