Finding the Fourth Proportional to 1,231.85, 1,699.98 and 672.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,231.85 : 1,699.98 = 672.37 : x
2. Step 2: Convert to fraction form
   1,231.85/1,699.98 = 672.37/x
3. Step 3: Cross multiply
   1,231.85x = 1,699.98 × 672.37
4. Step 4: Simplify right side
   1,231.85x = 1,143,007.05
5. Step 5: Solve for x
   x = 1,143,007.05/1,231.85
6. Step 6: Final answer
   x = 927.88