Finding the Fourth Proportional to 1,661.69, 2,293.15 and 953.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,661.69 : 2,293.15 = 953.57 : x
2. Step 2: Convert to fraction form
   1,661.69/2,293.15 = 953.57/x
3. Step 3: Cross multiply
   1,661.69x = 2,293.15 × 953.57
4. Step 4: Simplify right side
   1,661.69x = 2,186,679.05
5. Step 5: Solve for x
   x = 2,186,679.05/1,661.69
6. Step 6: Final answer
   x = 1,315.94