Finding the Fourth Proportional to 1,796.27, 2,478.79 and 999.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,796.27 : 2,478.79 = 999.57 : x
2. Step 2: Convert to fraction form
   1,796.27/2,478.79 = 999.57/x
3. Step 3: Cross multiply
   1,796.27x = 2,478.79 × 999.57
4. Step 4: Simplify right side
   1,796.27x = 2,477,724.12
5. Step 5: Solve for x
   x = 2,477,724.12/1,796.27
6. Step 6: Final answer
   x = 1,379.37