Finding the Fourth Proportional to 2,121.55, 3,181.65 and 1,010.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,121.55 : 3,181.65 = 1,010.82 : x
2. Step 2: Convert to fraction form
   2,121.55/3,181.65 = 1,010.82/x
3. Step 3: Cross multiply
   2,121.55x = 3,181.65 × 1,010.82
4. Step 4: Simplify right side
   2,121.55x = 3,216,059.54
5. Step 5: Solve for x
   x = 3,216,059.54/2,121.55
6. Step 6: Final answer
   x = 1,515.90