Finding the Fourth Proportional to 2,126.82, 3,187.80 and 957.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,126.82 : 3,187.80 = 957.72 : x
2. Step 2: Convert to fraction form
   2,126.82/3,187.80 = 957.72/x
3. Step 3: Cross multiply
   2,126.82x = 3,187.80 × 957.72
4. Step 4: Simplify right side
   2,126.82x = 3,053,019.82
5. Step 5: Solve for x
   x = 3,053,019.82/2,126.82
6. Step 6: Final answer
   x = 1,435.49