Finding the Fourth Proportional to 1,100.05, 1,518.14 and 602.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.05 : 1,518.14 = 602.78 : x
2. Step 2: Convert to fraction form
   1,100.05/1,518.14 = 602.78/x
3. Step 3: Cross multiply
   1,100.05x = 1,518.14 × 602.78
4. Step 4: Simplify right side
   1,100.05x = 915,098.35
5. Step 5: Solve for x
   x = 915,098.35/1,100.05
6. Step 6: Final answer
   x = 831.87