Finding the Fourth Proportional to 2,486.08, 3,728.31 and 842.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,486.08 : 3,728.31 = 842.59 : x
2. Step 2: Convert to fraction form
   2,486.08/3,728.31 = 842.59/x
3. Step 3: Cross multiply
   2,486.08x = 3,728.31 × 842.59
4. Step 4: Simplify right side
   2,486.08x = 3,141,436.72
5. Step 5: Solve for x
   x = 3,141,436.72/2,486.08
6. Step 6: Final answer
   x = 1,263.61