Finding the Fourth Proportional to 1,100.21, 1,518.33 and 602.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.21 : 1,518.33 = 602.87 : x
2. Step 2: Convert to fraction form
   1,100.21/1,518.33 = 602.87/x
3. Step 3: Cross multiply
   1,100.21x = 1,518.33 × 602.87
4. Step 4: Simplify right side
   1,100.21x = 915,355.61
5. Step 5: Solve for x
   x = 915,355.61/1,100.21
6. Step 6: Final answer
   x = 831.98