Finding the Fourth Proportional to 1,478.96, 2,040.97 and 815.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.96 : 2,040.97 = 815.83 : x
2. Step 2: Convert to fraction form
   1,478.96/2,040.97 = 815.83/x
3. Step 3: Cross multiply
   1,478.96x = 2,040.97 × 815.83
4. Step 4: Simplify right side
   1,478.96x = 1,665,076.39
5. Step 5: Solve for x
   x = 1,665,076.39/1,478.96
6. Step 6: Final answer
   x = 1,125.84