Finding the Fourth Proportional to 1,060.98, 1,463.55 and 618.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.98 : 1,463.55 = 618.83 : x
2. Step 2: Convert to fraction form
   1,060.98/1,463.55 = 618.83/x
3. Step 3: Cross multiply
   1,060.98x = 1,463.55 × 618.83
4. Step 4: Simplify right side
   1,060.98x = 905,688.65
5. Step 5: Solve for x
   x = 905,688.65/1,060.98
6. Step 6: Final answer
   x = 853.63