Finding the Fourth Proportional to 16,815.76, 25,221.18 and 5,722.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,815.76 : 25,221.18 = 5,722.78 : x
2. Step 2: Convert to fraction form
   16,815.76/25,221.18 = 5,722.78/x
3. Step 3: Cross multiply
   16,815.76x = 25,221.18 × 5,722.78
4. Step 4: Simplify right side
   16,815.76x = 144,335,264.48
5. Step 5: Solve for x
   x = 144,335,264.48/16,815.76
6. Step 6: Final answer
   x = 8,583.33