Finding the Fourth Proportional to 2,074.12, 3,111.18 and 613.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.12 : 3,111.18 = 613.42 : x
2. Step 2: Convert to fraction form
   2,074.12/3,111.18 = 613.42/x
3. Step 3: Cross multiply
   2,074.12x = 3,111.18 × 613.42
4. Step 4: Simplify right side
   2,074.12x = 1,908,460.04
5. Step 5: Solve for x
   x = 1,908,460.04/2,074.12
6. Step 6: Final answer
   x = 920.13