Finding the Fourth Proportional to 1,060.70, 1,463.72 and 618.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.70 : 1,463.72 = 618.54 : x
2. Step 2: Convert to fraction form
   1,060.70/1,463.72 = 618.54/x
3. Step 3: Cross multiply
   1,060.70x = 1,463.72 × 618.54
4. Step 4: Simplify right side
   1,060.70x = 905,369.37
5. Step 5: Solve for x
   x = 905,369.37/1,060.70
6. Step 6: Final answer
   x = 853.56