Finding the Fourth Proportional to 1,444.50, 1,993.28 and 913.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.50 : 1,993.28 = 913.55 : x
2. Step 2: Convert to fraction form
   1,444.50/1,993.28 = 913.55/x
3. Step 3: Cross multiply
   1,444.50x = 1,993.28 × 913.55
4. Step 4: Simplify right side
   1,444.50x = 1,820,946.41
5. Step 5: Solve for x
   x = 1,820,946.41/1,444.50
6. Step 6: Final answer
   x = 1,260.61