Finding the Fourth Proportional to 2,074.68, 3,111.96 and 613.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.68 : 3,111.96 = 613.86 : x
2. Step 2: Convert to fraction form
   2,074.68/3,111.96 = 613.86/x
3. Step 3: Cross multiply
   2,074.68x = 3,111.96 × 613.86
4. Step 4: Simplify right side
   2,074.68x = 1,910,307.77
5. Step 5: Solve for x
   x = 1,910,307.77/2,074.68
6. Step 6: Final answer
   x = 920.77