Finding the Fourth Proportional to 2,646.69, 3,969.69 and 699.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.69 : 3,969.69 = 699.05 : x
2. Step 2: Convert to fraction form
   2,646.69/3,969.69 = 699.05/x
3. Step 3: Cross multiply
   2,646.69x = 3,969.69 × 699.05
4. Step 4: Simplify right side
   2,646.69x = 2,774,991.95
5. Step 5: Solve for x
   x = 2,774,991.95/2,646.69
6. Step 6: Final answer
   x = 1,048.48