Finding the Fourth Proportional to 1,096.79, 1,513.28 and 648.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.79 : 1,513.28 = 648.67 : x
2. Step 2: Convert to fraction form
   1,096.79/1,513.28 = 648.67/x
3. Step 3: Cross multiply
   1,096.79x = 1,513.28 × 648.67
4. Step 4: Simplify right side
   1,096.79x = 981,615.76
5. Step 5: Solve for x
   x = 981,615.76/1,096.79
6. Step 6: Final answer
   x = 894.99