Finding the Fourth Proportional to 1,243.74, 1,864.56 and 696.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.74 : 1,864.56 = 696.10 : x
2. Step 2: Convert to fraction form
   1,243.74/1,864.56 = 696.10/x
3. Step 3: Cross multiply
   1,243.74x = 1,864.56 × 696.10
4. Step 4: Simplify right side
   1,243.74x = 1,297,920.22
5. Step 5: Solve for x
   x = 1,297,920.22/1,243.74
6. Step 6: Final answer
   x = 1,043.56