Finding the Fourth Proportional to 2,402.66, 3,603.69 and 842.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,402.66 : 3,603.69 = 842.55 : x
2. Step 2: Convert to fraction form
   2,402.66/3,603.69 = 842.55/x
3. Step 3: Cross multiply
   2,402.66x = 3,603.69 × 842.55
4. Step 4: Simplify right side
   2,402.66x = 3,036,295.77
5. Step 5: Solve for x
   x = 3,036,295.77/2,402.66
6. Step 6: Final answer
   x = 1,263.72