Finding the Fourth Proportional to 1,100.67, 1,518.90 and 603.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.67 : 1,518.90 = 603.30 : x
2. Step 2: Convert to fraction form
   1,100.67/1,518.90 = 603.30/x
3. Step 3: Cross multiply
   1,100.67x = 1,518.90 × 603.30
4. Step 4: Simplify right side
   1,100.67x = 916,352.37
5. Step 5: Solve for x
   x = 916,352.37/1,100.67
6. Step 6: Final answer
   x = 832.54