Finding the Fourth Proportional to 2,140.52, 3,210.52 and 580.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.52 : 3,210.52 = 580.42 : x
2. Step 2: Convert to fraction form
   2,140.52/3,210.52 = 580.42/x
3. Step 3: Cross multiply
   2,140.52x = 3,210.52 × 580.42
4. Step 4: Simplify right side
   2,140.52x = 1,863,452.58
5. Step 5: Solve for x
   x = 1,863,452.58/2,140.52
6. Step 6: Final answer
   x = 870.56