Finding the Fourth Proportional to 1,100.28, 1,518.81 and 658.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.28 : 1,518.81 = 658.35 : x
2. Step 2: Convert to fraction form
   1,100.28/1,518.81 = 658.35/x
3. Step 3: Cross multiply
   1,100.28x = 1,518.81 × 658.35
4. Step 4: Simplify right side
   1,100.28x = 999,908.56
5. Step 5: Solve for x
   x = 999,908.56/1,100.28
6. Step 6: Final answer
   x = 908.78