Finding the Fourth Proportional to 2,118.52, 3,176.55 and 818.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.52 : 3,176.55 = 818.47 : x
2. Step 2: Convert to fraction form
   2,118.52/3,176.55 = 818.47/x
3. Step 3: Cross multiply
   2,118.52x = 3,176.55 × 818.47
4. Step 4: Simplify right side
   2,118.52x = 2,599,910.88
5. Step 5: Solve for x
   x = 2,599,910.88/2,118.52
6. Step 6: Final answer
   x = 1,227.23