Finding the Fourth Proportional to 2,517.76, 3,772.20 and 1,216.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,517.76 : 3,772.20 = 1,216.42 : x
2. Step 2: Convert to fraction form
   2,517.76/3,772.20 = 1,216.42/x
3. Step 3: Cross multiply
   2,517.76x = 3,772.20 × 1,216.42
4. Step 4: Simplify right side
   2,517.76x = 4,588,579.52
5. Step 5: Solve for x
   x = 4,588,579.52/2,517.76
6. Step 6: Final answer
   x = 1,822.48