Finding the Fourth Proportional to 2,380.48, 3,285.96 and 2,131.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.48 : 3,285.96 = 2,131.35 : x
2. Step 2: Convert to fraction form
   2,380.48/3,285.96 = 2,131.35/x
3. Step 3: Cross multiply
   2,380.48x = 3,285.96 × 2,131.35
4. Step 4: Simplify right side
   2,380.48x = 7,003,530.85
5. Step 5: Solve for x
   x = 7,003,530.85/2,380.48
6. Step 6: Final answer
   x = 2,942.07