Finding the Fourth Proportional to 2,085.49, 3,128.13 and 698.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.49 : 3,128.13 = 698.98 : x
2. Step 2: Convert to fraction form
   2,085.49/3,128.13 = 698.98/x
3. Step 3: Cross multiply
   2,085.49x = 3,128.13 × 698.98
4. Step 4: Simplify right side
   2,085.49x = 2,186,500.31
5. Step 5: Solve for x
   x = 2,186,500.31/2,085.49
6. Step 6: Final answer
   x = 1,048.43