Finding the Fourth Proportional to 1,100.09, 1,518.10 and 602.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.09 : 1,518.10 = 602.72 : x
2. Step 2: Convert to fraction form
   1,100.09/1,518.10 = 602.72/x
3. Step 3: Cross multiply
   1,100.09x = 1,518.10 × 602.72
4. Step 4: Simplify right side
   1,100.09x = 914,989.23
5. Step 5: Solve for x
   x = 914,989.23/1,100.09
6. Step 6: Final answer
   x = 831.74