Finding the Fourth Proportional to 2,074.02, 3,110.71 and 612.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.02 : 3,110.71 = 612.86 : x
2. Step 2: Convert to fraction form
   2,074.02/3,110.71 = 612.86/x
3. Step 3: Cross multiply
   2,074.02x = 3,110.71 × 612.86
4. Step 4: Simplify right side
   2,074.02x = 1,906,429.73
5. Step 5: Solve for x
   x = 1,906,429.73/2,074.02
6. Step 6: Final answer
   x = 919.20