Finding the Fourth Proportional to 2,401.17, 3,601.62 and 840.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,401.17 : 3,601.62 = 840.57 : x
2. Step 2: Convert to fraction form
   2,401.17/3,601.62 = 840.57/x
3. Step 3: Cross multiply
   2,401.17x = 3,601.62 × 840.57
4. Step 4: Simplify right side
   2,401.17x = 3,027,413.72
5. Step 5: Solve for x
   x = 3,027,413.72/2,401.17
6. Step 6: Final answer
   x = 1,260.81