Finding the Fourth Proportional to 1,015.98, 1,402.56 and 684.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.98 : 1,402.56 = 684.42 : x
2. Step 2: Convert to fraction form
   1,015.98/1,402.56 = 684.42/x
3. Step 3: Cross multiply
   1,015.98x = 1,402.56 × 684.42
4. Step 4: Simplify right side
   1,015.98x = 959,940.12
5. Step 5: Solve for x
   x = 959,940.12/1,015.98
6. Step 6: Final answer
   x = 944.84