Finding the Fourth Proportional to 1,604.87, 2,215.20 and 1,015.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,604.87 : 2,215.20 = 1,015.59 : x
2. Step 2: Convert to fraction form
   1,604.87/2,215.20 = 1,015.59/x
3. Step 3: Cross multiply
   1,604.87x = 2,215.20 × 1,015.59
4. Step 4: Simplify right side
   1,604.87x = 2,249,729.89
5. Step 5: Solve for x
   x = 2,249,729.89/1,604.87
6. Step 6: Final answer
   x = 1,401.82