Finding the Fourth Proportional to 2,790.08, 4,185.52 and 842.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.08 : 4,185.52 = 842.43 : x
2. Step 2: Convert to fraction form
   2,790.08/4,185.52 = 842.43/x
3. Step 3: Cross multiply
   2,790.08x = 4,185.52 × 842.43
4. Step 4: Simplify right side
   2,790.08x = 3,526,003.40
5. Step 5: Solve for x
   x = 3,526,003.40/2,790.08
6. Step 6: Final answer
   x = 1,263.77