Finding the Fourth Proportional to 2,072.86, 3,108.22 and 611.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.86 : 3,108.22 = 611.82 : x
2. Step 2: Convert to fraction form
   2,072.86/3,108.22 = 611.82/x
3. Step 3: Cross multiply
   2,072.86x = 3,108.22 × 611.82
4. Step 4: Simplify right side
   2,072.86x = 1,901,671.16
5. Step 5: Solve for x
   x = 1,901,671.16/2,072.86
6. Step 6: Final answer
   x = 917.41