Finding the Fourth Proportional to 882.42, 1,215.45 and 685.59

Step by Step Solution

1. Step 1: Write the proportion equation
   882.42 : 1,215.45 = 685.59 : x
2. Step 2: Convert to fraction form
   882.42/1,215.45 = 685.59/x
3. Step 3: Cross multiply
   882.42x = 1,215.45 × 685.59
4. Step 4: Simplify right side
   882.42x = 833,300.37
5. Step 5: Solve for x
   x = 833,300.37/882.42
6. Step 6: Final answer
   x = 944.34