Finding the Fourth Proportional to 2,790.84, 4,185.30 and 842.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.84 : 4,185.30 = 842.52 : x
2. Step 2: Convert to fraction form
   2,790.84/4,185.30 = 842.52/x
3. Step 3: Cross multiply
   2,790.84x = 4,185.30 × 842.52
4. Step 4: Simplify right side
   2,790.84x = 3,526,198.96
5. Step 5: Solve for x
   x = 3,526,198.96/2,790.84
6. Step 6: Final answer
   x = 1,263.49