Finding the Fourth Proportional to 1,105.41, 1,524.90 and 663.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.41 : 1,524.90 = 663.15 : x
2. Step 2: Convert to fraction form
   1,105.41/1,524.90 = 663.15/x
3. Step 3: Cross multiply
   1,105.41x = 1,524.90 × 663.15
4. Step 4: Simplify right side
   1,105.41x = 1,011,237.44
5. Step 5: Solve for x
   x = 1,011,237.44/1,105.41
6. Step 6: Final answer
   x = 914.81