Finding the Fourth Proportional to 3,900.73, 5,851.17 and 1,820.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.73 : 5,851.17 = 1,820.17 : x
2. Step 2: Convert to fraction form
   3,900.73/5,851.17 = 1,820.17/x
3. Step 3: Cross multiply
   3,900.73x = 5,851.17 × 1,820.17
4. Step 4: Simplify right side
   3,900.73x = 10,650,102.65
5. Step 5: Solve for x
   x = 10,650,102.65/3,900.73
6. Step 6: Final answer
   x = 2,730.29