Finding the Fourth Proportional to 1,119.10, 1,544.55 and 699.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,119.10 : 1,544.55 = 699.72 : x
2. Step 2: Convert to fraction form
   1,119.10/1,544.55 = 699.72/x
3. Step 3: Cross multiply
   1,119.10x = 1,544.55 × 699.72
4. Step 4: Simplify right side
   1,119.10x = 1,080,752.53
5. Step 5: Solve for x
   x = 1,080,752.53/1,119.10
6. Step 6: Final answer
   x = 965.74