Finding the Fourth Proportional to 2,761.89, 3,812.99 and 1,820.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,761.89 : 3,812.99 = 1,820.42 : x
2. Step 2: Convert to fraction form
   2,761.89/3,812.99 = 1,820.42/x
3. Step 3: Cross multiply
   2,761.89x = 3,812.99 × 1,820.42
4. Step 4: Simplify right side
   2,761.89x = 6,941,243.69
5. Step 5: Solve for x
   x = 6,941,243.69/2,761.89
6. Step 6: Final answer
   x = 2,513.22