Finding the Fourth Proportional to 2,074.77, 3,111.71 and 613.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.77 : 3,111.71 = 613.53 : x
2. Step 2: Convert to fraction form
   2,074.77/3,111.71 = 613.53/x
3. Step 3: Cross multiply
   2,074.77x = 3,111.71 × 613.53
4. Step 4: Simplify right side
   2,074.77x = 1,909,124.37
5. Step 5: Solve for x
   x = 1,909,124.37/2,074.77
6. Step 6: Final answer
   x = 920.16