Finding the Fourth Proportional to 836.24, 1,152.52 and 680.72

Step by Step Solution

1. Step 1: Write the proportion equation
   836.24 : 1,152.52 = 680.72 : x
2. Step 2: Convert to fraction form
   836.24/1,152.52 = 680.72/x
3. Step 3: Cross multiply
   836.24x = 1,152.52 × 680.72
4. Step 4: Simplify right side
   836.24x = 784,543.41
5. Step 5: Solve for x
   x = 784,543.41/836.24
6. Step 6: Final answer
   x = 938.18