Finding the Fourth Proportional to 2,646.36, 3,969.22 and 698.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.36 : 3,969.22 = 698.72 : x
2. Step 2: Convert to fraction form
   2,646.36/3,969.22 = 698.72/x
3. Step 3: Cross multiply
   2,646.36x = 3,969.22 × 698.72
4. Step 4: Simplify right side
   2,646.36x = 2,773,373.40
5. Step 5: Solve for x
   x = 2,773,373.40/2,646.36
6. Step 6: Final answer
   x = 1,048.00