Finding the Fourth Proportional to 1,249.59, 1,724.41 and 690.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,249.59 : 1,724.41 = 690.07 : x
2. Step 2: Convert to fraction form
   1,249.59/1,724.41 = 690.07/x
3. Step 3: Cross multiply
   1,249.59x = 1,724.41 × 690.07
4. Step 4: Simplify right side
   1,249.59x = 1,189,963.61
5. Step 5: Solve for x
   x = 1,189,963.61/1,249.59
6. Step 6: Final answer
   x = 952.28