Finding the Fourth Proportional to 2,074.38, 3,111.15 and 613.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.38 : 3,111.15 = 613.17 : x
2. Step 2: Convert to fraction form
   2,074.38/3,111.15 = 613.17/x
3. Step 3: Cross multiply
   2,074.38x = 3,111.15 × 613.17
4. Step 4: Simplify right side
   2,074.38x = 1,907,663.85
5. Step 5: Solve for x
   x = 1,907,663.85/2,074.38
6. Step 6: Final answer
   x = 919.63