Finding the Fourth Proportional to 3,900.60, 5,850.98 and 1,820.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.60 : 5,850.98 = 1,820.04 : x
2. Step 2: Convert to fraction form
   3,900.60/5,850.98 = 1,820.04/x
3. Step 3: Cross multiply
   3,900.60x = 5,850.98 × 1,820.04
4. Step 4: Simplify right side
   3,900.60x = 10,649,032.27
5. Step 5: Solve for x
   x = 10,649,032.27/3,900.60
6. Step 6: Final answer
   x = 2,730.10