Finding the Fourth Proportional to 1,100.74, 1,518.78 and 658.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.74 : 1,518.78 = 658.57 : x
2. Step 2: Convert to fraction form
   1,100.74/1,518.78 = 658.57/x
3. Step 3: Cross multiply
   1,100.74x = 1,518.78 × 658.57
4. Step 4: Simplify right side
   1,100.74x = 1,000,222.94
5. Step 5: Solve for x
   x = 1,000,222.94/1,100.74
6. Step 6: Final answer
   x = 908.68