Finding the Fourth Proportional to 873.02, 1,308.72 and 824.69

Step by Step Solution

1. Step 1: Write the proportion equation
   873.02 : 1,308.72 = 824.69 : x
2. Step 2: Convert to fraction form
   873.02/1,308.72 = 824.69/x
3. Step 3: Cross multiply
   873.02x = 1,308.72 × 824.69
4. Step 4: Simplify right side
   873.02x = 1,079,288.30
5. Step 5: Solve for x
   x = 1,079,288.30/873.02
6. Step 6: Final answer
   x = 1,236.27