Finding the Fourth Proportional to 2,074.88, 3,111.23 and 613.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.88 : 3,111.23 = 613.82 : x
2. Step 2: Convert to fraction form
   2,074.88/3,111.23 = 613.82/x
3. Step 3: Cross multiply
   2,074.88x = 3,111.23 × 613.82
4. Step 4: Simplify right side
   2,074.88x = 1,909,735.20
5. Step 5: Solve for x
   x = 1,909,735.20/2,074.88
6. Step 6: Final answer
   x = 920.41