Finding the Fourth Proportional to 3,917.89, 5,876.86 and 996.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,917.89 : 5,876.86 = 996.20 : x
2. Step 2: Convert to fraction form
   3,917.89/5,876.86 = 996.20/x
3. Step 3: Cross multiply
   3,917.89x = 5,876.86 × 996.20
4. Step 4: Simplify right side
   3,917.89x = 5,854,527.93
5. Step 5: Solve for x
   x = 5,854,527.93/3,917.89
6. Step 6: Final answer
   x = 1,494.31