Finding the Fourth Proportional to 2,380.30, 3,570.37 and 992.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.30 : 3,570.37 = 992.77 : x
2. Step 2: Convert to fraction form
   2,380.30/3,570.37 = 992.77/x
3. Step 3: Cross multiply
   2,380.30x = 3,570.37 × 992.77
4. Step 4: Simplify right side
   2,380.30x = 3,544,556.22
5. Step 5: Solve for x
   x = 3,544,556.22/2,380.30
6. Step 6: Final answer
   x = 1,489.12