Finding the Fourth Proportional to 1,007.51, 1,390.42 and 758.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.51 : 1,390.42 = 758.38 : x
2. Step 2: Convert to fraction form
   1,007.51/1,390.42 = 758.38/x
3. Step 3: Cross multiply
   1,007.51x = 1,390.42 × 758.38
4. Step 4: Simplify right side
   1,007.51x = 1,054,466.72
5. Step 5: Solve for x
   x = 1,054,466.72/1,007.51
6. Step 6: Final answer
   x = 1,046.61