Finding the Fourth Proportional to 1,100.51, 1,518.72 and 603.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.51 : 1,518.72 = 603.20 : x
2. Step 2: Convert to fraction form
   1,100.51/1,518.72 = 603.20/x
3. Step 3: Cross multiply
   1,100.51x = 1,518.72 × 603.20
4. Step 4: Simplify right side
   1,100.51x = 916,084.31
5. Step 5: Solve for x
   x = 916,084.31/1,100.51
6. Step 6: Final answer
   x = 832.42