Finding the Fourth Proportional to 1,110.54, 1,665.72 and 648.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,110.54 : 1,665.72 = 648.03 : x
2. Step 2: Convert to fraction form
   1,110.54/1,665.72 = 648.03/x
3. Step 3: Cross multiply
   1,110.54x = 1,665.72 × 648.03
4. Step 4: Simplify right side
   1,110.54x = 1,079,436.53
5. Step 5: Solve for x
   x = 1,079,436.53/1,110.54
6. Step 6: Final answer
   x = 971.99