Finding the Fourth Proportional to 2,085.98, 3,128.98 and 605.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.98 : 3,128.98 = 605.24 : x
2. Step 2: Convert to fraction form
   2,085.98/3,128.98 = 605.24/x
3. Step 3: Cross multiply
   2,085.98x = 3,128.98 × 605.24
4. Step 4: Simplify right side
   2,085.98x = 1,893,783.86
5. Step 5: Solve for x
   x = 1,893,783.86/2,085.98
6. Step 6: Final answer
   x = 907.86