Finding the Fourth Proportional to 2,100.84, 3,163.77 and 1,830.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.84 : 3,163.77 = 1,830.20 : x
2. Step 2: Convert to fraction form
   2,100.84/3,163.77 = 1,830.20/x
3. Step 3: Cross multiply
   2,100.84x = 3,163.77 × 1,830.20
4. Step 4: Simplify right side
   2,100.84x = 5,790,331.85
5. Step 5: Solve for x
   x = 5,790,331.85/2,100.84
6. Step 6: Final answer
   x = 2,756.20