Finding the Fourth Proportional to 1,648.86, 2,473.20 and 999.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.86 : 2,473.20 = 999.42 : x
2. Step 2: Convert to fraction form
   1,648.86/2,473.20 = 999.42/x
3. Step 3: Cross multiply
   1,648.86x = 2,473.20 × 999.42
4. Step 4: Simplify right side
   1,648.86x = 2,471,765.54
5. Step 5: Solve for x
   x = 2,471,765.54/1,648.86
6. Step 6: Final answer
   x = 1,499.08