Finding the Fourth Proportional to 1,007.33, 1,513.31 and 715.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.33 : 1,513.31 = 715.54 : x
2. Step 2: Convert to fraction form
   1,007.33/1,513.31 = 715.54/x
3. Step 3: Cross multiply
   1,007.33x = 1,513.31 × 715.54
4. Step 4: Simplify right side
   1,007.33x = 1,082,829.20
5. Step 5: Solve for x
   x = 1,082,829.20/1,007.33
6. Step 6: Final answer
   x = 1,074.95