Finding the Fourth Proportional to 1,339.47, 1,999.76 and 1,144.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.47 : 1,999.76 = 1,144.53 : x
2. Step 2: Convert to fraction form
   1,339.47/1,999.76 = 1,144.53/x
3. Step 3: Cross multiply
   1,339.47x = 1,999.76 × 1,144.53
4. Step 4: Simplify right side
   1,339.47x = 2,288,779.59
5. Step 5: Solve for x
   x = 2,288,779.59/1,339.47
6. Step 6: Final answer
   x = 1,708.72