Finding the Fourth Proportional to 1,144.84, 1,581.94 and 913.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.84 : 1,581.94 = 913.80 : x
2. Step 2: Convert to fraction form
   1,144.84/1,581.94 = 913.80/x
3. Step 3: Cross multiply
   1,144.84x = 1,581.94 × 913.80
4. Step 4: Simplify right side
   1,144.84x = 1,445,576.77
5. Step 5: Solve for x
   x = 1,445,576.77/1,144.84
6. Step 6: Final answer
   x = 1,262.69