Finding the Fourth Proportional to 2,604.47, 3,901.47 and 1,215.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,604.47 : 3,901.47 = 1,215.89 : x
2. Step 2: Convert to fraction form
   2,604.47/3,901.47 = 1,215.89/x
3. Step 3: Cross multiply
   2,604.47x = 3,901.47 × 1,215.89
4. Step 4: Simplify right side
   2,604.47x = 4,743,758.36
5. Step 5: Solve for x
   x = 4,743,758.36/2,604.47
6. Step 6: Final answer
   x = 1,821.39