Finding the Fourth Proportional to 1,444.61, 1,993.56 and 815.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.61 : 1,993.56 = 815.15 : x
2. Step 2: Convert to fraction form
   1,444.61/1,993.56 = 815.15/x
3. Step 3: Cross multiply
   1,444.61x = 1,993.56 × 815.15
4. Step 4: Simplify right side
   1,444.61x = 1,625,036.39
5. Step 5: Solve for x
   x = 1,625,036.39/1,444.61
6. Step 6: Final answer
   x = 1,124.89