Finding the Fourth Proportional to 2,085.09, 3,125.28 and 698.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.09 : 3,125.28 = 698.10 : x
2. Step 2: Convert to fraction form
   2,085.09/3,125.28 = 698.10/x
3. Step 3: Cross multiply
   2,085.09x = 3,125.28 × 698.10
4. Step 4: Simplify right side
   2,085.09x = 2,181,754.48
5. Step 5: Solve for x
   x = 2,181,754.48/2,085.09
6. Step 6: Final answer
   x = 1,046.36