Finding the Fourth Proportional to 1,449.71, 2,172.04 and 755.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,449.71 : 2,172.04 = 755.31 : x
2. Step 2: Convert to fraction form
   1,449.71/2,172.04 = 755.31/x
3. Step 3: Cross multiply
   1,449.71x = 2,172.04 × 755.31
4. Step 4: Simplify right side
   1,449.71x = 1,640,561.64
5. Step 5: Solve for x
   x = 1,640,561.64/1,449.71
6. Step 6: Final answer
   x = 1,131.65