Finding the Fourth Proportional to 1,100.24, 1,518.13 and 768.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.24 : 1,518.13 = 768.55 : x
2. Step 2: Convert to fraction form
   1,100.24/1,518.13 = 768.55/x
3. Step 3: Cross multiply
   1,100.24x = 1,518.13 × 768.55
4. Step 4: Simplify right side
   1,100.24x = 1,166,758.81
5. Step 5: Solve for x
   x = 1,166,758.81/1,100.24
6. Step 6: Final answer
   x = 1,060.46