Finding the Fourth Proportional to 1,048.31, 1,570.83 and 662.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.31 : 1,570.83 = 662.75 : x
2. Step 2: Convert to fraction form
   1,048.31/1,570.83 = 662.75/x
3. Step 3: Cross multiply
   1,048.31x = 1,570.83 × 662.75
4. Step 4: Simplify right side
   1,048.31x = 1,041,067.58
5. Step 5: Solve for x
   x = 1,041,067.58/1,048.31
6. Step 6: Final answer
   x = 993.09