Finding the Fourth Proportional to 1,499.44, 2,069.49 and 1,144.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.44 : 2,069.49 = 1,144.78 : x
2. Step 2: Convert to fraction form
   1,499.44/2,069.49 = 1,144.78/x
3. Step 3: Cross multiply
   1,499.44x = 2,069.49 × 1,144.78
4. Step 4: Simplify right side
   1,499.44x = 2,369,110.76
5. Step 5: Solve for x
   x = 2,369,110.76/1,499.44
6. Step 6: Final answer
   x = 1,580.00