Finding the Fourth Proportional to 1,306.56, 1,958.72 and 872.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,306.56 : 1,958.72 = 872.96 : x
2. Step 2: Convert to fraction form
   1,306.56/1,958.72 = 872.96/x
3. Step 3: Cross multiply
   1,306.56x = 1,958.72 × 872.96
4. Step 4: Simplify right side
   1,306.56x = 1,709,884.21
5. Step 5: Solve for x
   x = 1,709,884.21/1,306.56
6. Step 6: Final answer
   x = 1,308.69