Finding the Fourth Proportional to 1,009.31, 1,513.43 and 662.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.31 : 1,513.43 = 662.83 : x
2. Step 2: Convert to fraction form
   1,009.31/1,513.43 = 662.83/x
3. Step 3: Cross multiply
   1,009.31x = 1,513.43 × 662.83
4. Step 4: Simplify right side
   1,009.31x = 1,003,154.44
5. Step 5: Solve for x
   x = 1,003,154.44/1,009.31
6. Step 6: Final answer
   x = 993.90