Finding the Fourth Proportional to 2,521.59, 3,782.21 and 790.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.59 : 3,782.21 = 790.17 : x
2. Step 2: Convert to fraction form
   2,521.59/3,782.21 = 790.17/x
3. Step 3: Cross multiply
   2,521.59x = 3,782.21 × 790.17
4. Step 4: Simplify right side
   2,521.59x = 2,988,584.92
5. Step 5: Solve for x
   x = 2,988,584.92/2,521.59
6. Step 6: Final answer
   x = 1,185.20