Finding the Fourth Proportional to 1,202.69, 1,659.72 and 671.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,202.69 : 1,659.72 = 671.57 : x
2. Step 2: Convert to fraction form
   1,202.69/1,659.72 = 671.57/x
3. Step 3: Cross multiply
   1,202.69x = 1,659.72 × 671.57
4. Step 4: Simplify right side
   1,202.69x = 1,114,609.86
5. Step 5: Solve for x
   x = 1,114,609.86/1,202.69
6. Step 6: Final answer
   x = 926.77