Finding the Fourth Proportional to 870.56, 1,304.42 and 696.31

Step by Step Solution

1. Step 1: Write the proportion equation
   870.56 : 1,304.42 = 696.31 : x
2. Step 2: Convert to fraction form
   870.56/1,304.42 = 696.31/x
3. Step 3: Cross multiply
   870.56x = 1,304.42 × 696.31
4. Step 4: Simplify right side
   870.56x = 908,280.69
5. Step 5: Solve for x
   x = 908,280.69/870.56
6. Step 6: Final answer
   x = 1,043.33