Finding the Fourth Proportional to 2,290.39, 3,435.57 and 992.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.39 : 3,435.57 = 992.77 : x
2. Step 2: Convert to fraction form
   2,290.39/3,435.57 = 992.77/x
3. Step 3: Cross multiply
   2,290.39x = 3,435.57 × 992.77
4. Step 4: Simplify right side
   2,290.39x = 3,410,730.83
5. Step 5: Solve for x
   x = 3,410,730.83/2,290.39
6. Step 6: Final answer
   x = 1,489.15