Finding the Fourth Proportional to 2,646.06, 3,969.06 and 698.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.06 : 3,969.06 = 698.10 : x
2. Step 2: Convert to fraction form
   2,646.06/3,969.06 = 698.10/x
3. Step 3: Cross multiply
   2,646.06x = 3,969.06 × 698.10
4. Step 4: Simplify right side
   2,646.06x = 2,770,800.79
5. Step 5: Solve for x
   x = 2,770,800.79/2,646.06
6. Step 6: Final answer
   x = 1,047.14