Finding the Fourth Proportional to 1,100.40, 1,518.55 and 603.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.40 : 1,518.55 = 603.07 : x
2. Step 2: Convert to fraction form
   1,100.40/1,518.55 = 603.07/x
3. Step 3: Cross multiply
   1,100.40x = 1,518.55 × 603.07
4. Step 4: Simplify right side
   1,100.40x = 915,788.93
5. Step 5: Solve for x
   x = 915,788.93/1,100.40
6. Step 6: Final answer
   x = 832.23