Finding the Fourth Proportional to 1,100.66, 1,518.91 and 603.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.66 : 1,518.91 = 603.30 : x
2. Step 2: Convert to fraction form
   1,100.66/1,518.91 = 603.30/x
3. Step 3: Cross multiply
   1,100.66x = 1,518.91 × 603.30
4. Step 4: Simplify right side
   1,100.66x = 916,358.40
5. Step 5: Solve for x
   x = 916,358.40/1,100.66
6. Step 6: Final answer
   x = 832.55