Finding the Fourth Proportional to 1,014.18, 1,399.56 and 615.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.18 : 1,399.56 = 615.96 : x
2. Step 2: Convert to fraction form
   1,014.18/1,399.56 = 615.96/x
3. Step 3: Cross multiply
   1,014.18x = 1,399.56 × 615.96
4. Step 4: Simplify right side
   1,014.18x = 862,072.98
5. Step 5: Solve for x
   x = 862,072.98/1,014.18
6. Step 6: Final answer
   x = 850.02