Finding the Fourth Proportional to 1,100.51, 1,518.55 and 658.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.51 : 1,518.55 = 658.31 : x
2. Step 2: Convert to fraction form
   1,100.51/1,518.55 = 658.31/x
3. Step 3: Cross multiply
   1,100.51x = 1,518.55 × 658.31
4. Step 4: Simplify right side
   1,100.51x = 999,678.80
5. Step 5: Solve for x
   x = 999,678.80/1,100.51
6. Step 6: Final answer
   x = 908.38