Finding the Fourth Proportional to 2,519.94, 3,780.18 and 1,221.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,519.94 : 3,780.18 = 1,221.24 : x
2. Step 2: Convert to fraction form
   2,519.94/3,780.18 = 1,221.24/x
3. Step 3: Cross multiply
   2,519.94x = 3,780.18 × 1,221.24
4. Step 4: Simplify right side
   2,519.94x = 4,616,507.02
5. Step 5: Solve for x
   x = 4,616,507.02/2,519.94
6. Step 6: Final answer
   x = 1,831.99