Finding the Fourth Proportional to 1,890.48, 2,608.98 and 1,144.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.48 : 2,608.98 = 1,144.47 : x
2. Step 2: Convert to fraction form
   1,890.48/2,608.98 = 1,144.47/x
3. Step 3: Cross multiply
   1,890.48x = 2,608.98 × 1,144.47
4. Step 4: Simplify right side
   1,890.48x = 2,985,899.34
5. Step 5: Solve for x
   x = 2,985,899.34/1,890.48
6. Step 6: Final answer
   x = 1,579.44