Finding the Fourth Proportional to 2,117.92, 3,176.86 and 818.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.92 : 3,176.86 = 818.48 : x
2. Step 2: Convert to fraction form
   2,117.92/3,176.86 = 818.48/x
3. Step 3: Cross multiply
   2,117.92x = 3,176.86 × 818.48
4. Step 4: Simplify right side
   2,117.92x = 2,600,196.37
5. Step 5: Solve for x
   x = 2,600,196.37/2,117.92
6. Step 6: Final answer
   x = 1,227.71