Finding the Fourth Proportional to 2,010.76, 3,015.86 and 1,120.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,010.76 : 3,015.86 = 1,120.42 : x
2. Step 2: Convert to fraction form
   2,010.76/3,015.86 = 1,120.42/x
3. Step 3: Cross multiply
   2,010.76x = 3,015.86 × 1,120.42
4. Step 4: Simplify right side
   2,010.76x = 3,379,029.86
5. Step 5: Solve for x
   x = 3,379,029.86/2,010.76
6. Step 6: Final answer
   x = 1,680.47