Finding the Fourth Proportional to 1,144.58, 1,715.57 and 451.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.58 : 1,715.57 = 451.12 : x
2. Step 2: Convert to fraction form
   1,144.58/1,715.57 = 451.12/x
3. Step 3: Cross multiply
   1,144.58x = 1,715.57 × 451.12
4. Step 4: Simplify right side
   1,144.58x = 773,927.94
5. Step 5: Solve for x
   x = 773,927.94/1,144.58
6. Step 6: Final answer
   x = 676.17