Finding the Fourth Proportional to 2,100.82, 3,151.23 and 561.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.82 : 3,151.23 = 561.82 : x
2. Step 2: Convert to fraction form
   2,100.82/3,151.23 = 561.82/x
3. Step 3: Cross multiply
   2,100.82x = 3,151.23 × 561.82
4. Step 4: Simplify right side
   2,100.82x = 1,770,424.04
5. Step 5: Solve for x
   x = 1,770,424.04/2,100.82
6. Step 6: Final answer
   x = 842.73