Finding the Fourth Proportional to 2,646.69, 3,970.07 and 698.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.69 : 3,970.07 = 698.82 : x
2. Step 2: Convert to fraction form
   2,646.69/3,970.07 = 698.82/x
3. Step 3: Cross multiply
   2,646.69x = 3,970.07 × 698.82
4. Step 4: Simplify right side
   2,646.69x = 2,774,364.32
5. Step 5: Solve for x
   x = 2,774,364.32/2,646.69
6. Step 6: Final answer
   x = 1,048.24