Finding the Fourth Proportional to 1,250.37, 1,725.57 and 690.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,250.37 : 1,725.57 = 690.90 : x
2. Step 2: Convert to fraction form
   1,250.37/1,725.57 = 690.90/x
3. Step 3: Cross multiply
   1,250.37x = 1,725.57 × 690.90
4. Step 4: Simplify right side
   1,250.37x = 1,192,196.31
5. Step 5: Solve for x
   x = 1,192,196.31/1,250.37
6. Step 6: Final answer
   x = 953.47