Finding the Fourth Proportional to 1,250.43, 1,725.59 and 690.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,250.43 : 1,725.59 = 690.89 : x
2. Step 2: Convert to fraction form
   1,250.43/1,725.59 = 690.89/x
3. Step 3: Cross multiply
   1,250.43x = 1,725.59 × 690.89
4. Step 4: Simplify right side
   1,250.43x = 1,192,180.79
5. Step 5: Solve for x
   x = 1,192,180.79/1,250.43
6. Step 6: Final answer
   x = 953.42