Finding the Fourth Proportional to 2,084.90, 3,128.04 and 698.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,084.90 : 3,128.04 = 698.37 : x
2. Step 2: Convert to fraction form
   2,084.90/3,128.04 = 698.37/x
3. Step 3: Cross multiply
   2,084.90x = 3,128.04 × 698.37
4. Step 4: Simplify right side
   2,084.90x = 2,184,529.29
5. Step 5: Solve for x
   x = 2,184,529.29/2,084.90
6. Step 6: Final answer
   x = 1,047.79