Finding the Fourth Proportional to 2,180.81, 3,271.17 and 620.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.81 : 3,271.17 = 620.82 : x
2. Step 2: Convert to fraction form
   2,180.81/3,271.17 = 620.82/x
3. Step 3: Cross multiply
   2,180.81x = 3,271.17 × 620.82
4. Step 4: Simplify right side
   2,180.81x = 2,030,805.43
5. Step 5: Solve for x
   x = 2,030,805.43/2,180.81
6. Step 6: Final answer
   x = 931.22