Finding the Fourth Proportional to 2,151.10, 3,222.60 and 2,005.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.10 : 3,222.60 = 2,005.30 : x
2. Step 2: Convert to fraction form
   2,151.10/3,222.60 = 2,005.30/x
3. Step 3: Cross multiply
   2,151.10x = 3,222.60 × 2,005.30
4. Step 4: Simplify right side
   2,151.10x = 6,462,279.78
5. Step 5: Solve for x
   x = 6,462,279.78/2,151.10
6. Step 6: Final answer
   x = 3,004.17